Upgrade to base64 0.22. (#289)

Author: partim

Cargo.toml

@@ -18,7 +18,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 arbitrary       = { version = "1", optional = true, features = ["derive"] }
-base64          = "0.21"
+base64          = "0.22"
 bcder           = { version = "0.7.3", optional = true }
 bytes           = "1.0"
 chrono          = { version = "0.4.35", features = [ "serde" ] }