Updates crates to edition 2021 and bumps versions (#346)

This PR updates the Rust edition of:

* ion-rs
* ion-hash
* ion-c-sys-macros
* ion-c-sys

from 2018 to 2021. No code changes were required. This patch also
bumps their respective versions.

* Update pinned version of nightly

Co-authored-by: Zack Slayton <[email protected]>

Author: zslayton

.github/workflows/coverage.yml

@@ -23,7 +23,7 @@ jobs:
         with:
           profile: minimal
           # nightly can be very volatile--pin this to a version we know works well...
-          toolchain: nightly-2021-08-30
+          toolchain: nightly-2022-01-10
           override: true
       - name: Cargo Test
         uses: actions-rs/cargo@v1

Cargo.toml

@@ -16,8 +16,8 @@ exclude = [
   "**/ion-tests/iontestdata/**",
   "*.pdf"
 ]
-version = "0.7.0"
-edition = "2018"
+version = "0.8.0"
+edition = "2021"
 
 [workspace]
 members = [

ion-c-sys-macros/Cargo.toml

@@ -12,8 +12,8 @@ exclude = [
   "**/.git/**",
   "**/.github/**",
 ]
-version = "0.1.0"
-edition = "2018"
+version = "0.1.1"
+edition = "2021"
 
 [lib]
 proc-macro = true

ion-c-sys/Cargo.toml

@@ -16,8 +16,8 @@ exclude = [
     "**/ion-tests/iontestdata/**",
     "*.pdf"
 ]
-version = "0.4.12"
-edition = "2018"
+version = "0.4.13"
+edition = "2021"
 
 [dependencies]
 ion-c-sys-macros = { version = "0.1", path = "../ion-c-sys-macros" }

ion-hash/Cargo.toml

@@ -16,11 +16,11 @@ exclude = [
     "**/ion-tests/iontestdata/**",
     "*.pdf"
 ]
-version = "0.0.4"
-edition = "2018"
+version = "0.0.5"
+edition = "2021"
 
 [dependencies]
-ion-rs = { path = "../", version = "0.7" }
+ion-rs = { path = "../", version = "0.8" }
 ion-c-sys = { path = "../ion-c-sys", version = "0.4" }
 num-bigint = "0.3"
 digest = "0.9"