diff --git a/Cargo.lock b/Cargo.lock
index b811ca6b10..c612e878d8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,3 +1,11 @@
+[[package]]
+name = "MacTypes-sys"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "adler32"
 version = "1.0.3"
@@ -8,7 +16,7 @@ name = "aho-corasick"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -32,7 +40,7 @@ dependencies = [
  "ole32-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "shell32-sys 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "xdg 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -45,24 +53,30 @@ dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "autocfg"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "backtrace"
-version = "0.3.9"
+version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc-demangle 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc-demangle 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.24"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -85,18 +99,18 @@ name = "block-buffer"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "block-padding 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "byte-tools 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "block-padding 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "generic-array 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "block-padding"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byte-tools 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -106,7 +120,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byte-tools"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -119,22 +133,22 @@ name = "bzip2"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bzip2-sys 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bzip2-sys 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "bzip2-sys"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "cc"
-version = "1.0.29"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -191,10 +205,10 @@ dependencies = [
 
 [[package]]
 name = "crc32fast"
-version = "1.0.3"
+version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -210,7 +224,7 @@ name = "error-chain"
 version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -220,21 +234,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "flate2"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "flate2-crc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "miniz-sys 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "miniz_oxide_c_api 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "flate2-crc"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide_c_api 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -260,17 +266,8 @@ dependencies = [
 ]
 
 [[package]]
-name = "fuchsia-zircon"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-zircon-sys 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "fuchsia-zircon-sys"
-version = "0.3.3"
+name = "fuchsia-cprng"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -296,12 +293,12 @@ dependencies = [
  "language-tags 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "mime 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
  "traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicase 1.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -321,7 +318,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "matches 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -331,7 +328,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "lazy_static"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -341,12 +338,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libflate"
-version = "0.1.18"
+version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -377,18 +374,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "block-buffer 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "memchr"
-version = "2.1.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "mime"
@@ -403,13 +395,13 @@ name = "miniz-sys"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "miniz_oxide"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -417,13 +409,13 @@ dependencies = [
 
 [[package]]
 name = "miniz_oxide_c_api"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "crc 1.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "miniz_oxide 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz_oxide 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -431,21 +423,21 @@ name = "native-tls"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl 0.10.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.10.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-probe 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "schannel 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "security-framework 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "security-framework-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "schannel 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework-sys 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempfile 3.0.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "num_cpus"
-version = "1.8.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -462,20 +454,20 @@ dependencies = [
 
 [[package]]
 name = "opaque-debug"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl"
-version = "0.10.15"
+version = "0.10.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -485,12 +477,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.39"
+version = "0.9.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -511,7 +504,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "proc-macro2"
-version = "0.4.20"
+version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -519,52 +512,62 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "0.6.9"
+version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand"
-version = "0.4.3"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand"
-version = "0.6.1"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_pcg 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_xorshift 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_jitter 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_os 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_chacha"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_core"
-version = "0.3.0"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -572,7 +575,7 @@ name = "rand_hc"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -580,29 +583,60 @@ name = "rand_isaac"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_jitter"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rand_os"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_pcg"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rand_xorshift"
-version = "0.1.0"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rdrand"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand_core 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "redox_syscall"
-version = "0.1.40"
+version = "0.1.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -610,27 +644,27 @@ name = "redox_termios"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex"
-version = "1.1.0"
+version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "aho-corasick 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 2.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.2"
+version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "ucd-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -643,7 +677,7 @@ dependencies = [
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.9"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -661,29 +695,30 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "schannel"
-version = "0.1.14"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "security-framework"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "core-foundation 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "security-framework-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "security-framework-sys 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "security-framework-sys"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "MacTypes-sys 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "core-foundation-sys 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -703,17 +738,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.88"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "serde_derive 1.0.89 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.88"
+version = "1.0.89"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.22 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -724,7 +762,7 @@ dependencies = [
  "block-buffer 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "digest 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "opaque-debug 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -736,6 +774,11 @@ dependencies = [
  "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "smallvec"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "strsim"
 version = "0.7.0"
@@ -743,11 +786,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "syn"
-version = "0.15.22"
+version = "0.15.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -757,20 +800,19 @@ version = "0.1.12-dev"
 dependencies = [
  "aho-corasick 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "app_dirs 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.29 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.30 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "fs2 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.10.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper-native-tls 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
  "md-5 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.89 (registry+https://github.com/rust-lang/crates.io-index)",
  "sha2 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tectonic_xdv 0.1.9-dev",
  "tempdir 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -793,7 +835,7 @@ name = "tempdir"
 version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -804,8 +846,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
  "remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -824,7 +866,7 @@ version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
  "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -841,16 +883,16 @@ name = "thread_local"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "time"
-version = "0.1.40"
+version = "0.1.42"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "libc 0.2.49 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -859,7 +901,7 @@ name = "toml"
 version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.88 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.89 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -879,7 +921,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "ucd-util"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -900,8 +942,11 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "smallvec 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "unicode-width"
@@ -915,7 +960,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "url"
-version = "1.7.1"
+version = "1.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "idna 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -969,7 +1014,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "winapi-util"
-version = "0.1.1"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -986,12 +1031,12 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "xdg"
-version = "2.1.0"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1000,123 +1045,128 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bzip2 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "crc32fast 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "libflate 0.1.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crc32fast 1.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libflate 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "podio 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
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 "checksum adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7e522997b529f05601e05166c07ed17789691f562762c7f3b987263d2dedee5c"
 "checksum aho-corasick 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "81ce3d38065e618af2d7b77e10c5ad9a069859b4be3c2250f674af3840d9c8a5"
 "checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum antidote 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "34fde25430d87a9388dadbe6e34d7f72a462c8b43ac8d309b42b0a8505d7e2a5"
 "checksum app_dirs 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e73a24bad9bd6a94d6395382a6c69fe071708ae4409f763c5475e14ee896313d"
 "checksum atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "9a7d5b8723950951411ee34d271d99dddcc2035a16ab25310ea2c8cfd4369652"
-"checksum backtrace 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "89a47830402e9981c5c41223151efcced65a0510c13097c769cede7efb34782a"
-"checksum backtrace-sys 0.1.24 (registry+https://github.com/rust-lang/crates.io-index)" = "c66d56ac8dabd07f6aacdaf633f4b8262f5b3601a810a0dcddffd5c22c69daa0"
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-"checksum url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2a321979c09843d272956e73700d12c4e7d3d92b2ee112b31548aef0d4efc5a6"
+"checksum url 1.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "dd4e7c0d531266369519a4aa4f399d748bd37043b00bde1e4ff1f60a120b355a"
 "checksum utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "796f7e48bef87609f7ade7e06495a87d5cd06c7866e6a5cbfceffc558a243737"
 "checksum vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "def296d3eb3b12371b2c7d0e83bfe1403e4db2d7a0bba324a12b21c4ee13143d"
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@@ -1125,8 +1175,8 @@ dependencies = [
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 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
-"checksum winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "afc5508759c5bf4285e61feb862b6083c8480aec864fa17a81fdec6f69b461ab"
+"checksum winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7168bab6e1daee33b4557efd0e95d5ca70a03706d39fa5f3fe7a236f584b03c9"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
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-"checksum xdg 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a66b7c2281ebde13cf4391d70d4c7e5946c3c25e72a7b859ca8f677dcd0b0c61"
+"checksum xdg 2.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d089681aa106a86fade1b0128fb5daf07d5867a509ab036d99988dec80429a57"
 "checksum zip 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "00acf1fafb786ff450b6726e5be41ef029142597b47a40ce80f952f1471730a0"
diff --git a/Cargo.toml b/Cargo.toml
index 5a7c250c0e..c19566c2a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 # Cargo.toml -- Cargo definition file for Tectonic.
-# Copyright 2016-2018 the Tectonic Project
+# Copyright 2016-2019 the Tectonic Project
 # Licensed under the MIT License.
 
 [package]
@@ -51,8 +51,7 @@ libc = "^0.2"
 tempfile = "^3.0"
 md-5 = "^0.8"
 sha2 = "^0.8"
-serde = { version = "^1.0", optional = true }
-serde_derive = { version = "^1.0", optional = true }
+serde = { version = "^1.0", features = ["derive"], optional = true }
 tectonic_xdv = { path = "xdv", version = "0.1.9-dev" }
 termcolor = "^1.0"
 toml = "^0.4"
@@ -60,7 +59,10 @@ zip = "^0.5"
 
 [features]
 default = ["serialization"]
-serialization = ["serde", "serde_derive"]
+# Note: we used to have this to couple "serde" and "serde-derive", but we've
+# adopted the newer scheme to avoid having to depend on both -- should maybe
+# just get rid of this feature:
+serialization = ["serde"]
 
 # freetype-sys = "^0.4"
 # harfbuzz-sys = "^0.1"
diff --git a/src/config.rs b/src/config.rs
index 0879ee01f1..ce6e6485ba 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -10,6 +10,8 @@
 //! running the command-line client. So we begrudgingly have a *little*
 //! configuration.
 
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 use std::ffi::OsStr;
 use std::fs::File;
 use std::path::PathBuf;
@@ -37,12 +39,12 @@ pub fn activate_config_test_mode(forced: bool) {
     CONFIG_TEST_MODE_ACTIVATED.store(forced, Ordering::SeqCst);
 }
 
-#[cfg_attr(feature = "serde_derive", derive(Deserialize, Serialize))]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub struct PersistentConfig {
     default_bundles: Vec<BundleInfo>,
 }
 
-#[cfg_attr(feature = "serde_derive", derive(Deserialize, Serialize))]
+#[cfg_attr(feature = "serde", derive(Deserialize, Serialize))]
 pub struct BundleInfo {
     url: String,
 }
diff --git a/src/lib.rs b/src/lib.rs
index fe80462623..4b9e4ca147 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -60,14 +60,11 @@ extern crate hyper_native_tls;
 extern crate lazy_static;
 extern crate libc;
 extern crate md5;
-extern crate tempfile;
-#[cfg(feature = "serde_derive")]
-#[macro_use]
-extern crate serde_derive;
 #[cfg(feature = "serde")]
 extern crate serde;
 extern crate sha2;
 extern crate tectonic_xdv;
+extern crate tempfile;
 extern crate termcolor;
 extern crate toml;
 extern crate zip;