Add hex-encoding examples based on base16ct (#595)

gost94/Cargo.toml

@@ -18,6 +18,7 @@ digest = "=0.11.0-pre.8"
 [dev-dependencies]
 digest = { version = "=0.11.0-pre.8", features = ["dev"] }
 hex-literal = "0.4"
+base16ct = { version = "0.2", features = ["alloc"] }
 
 [features]
 default = ["oid", "std"]

gost94/README.md

@@ -20,6 +20,10 @@ hasher.update("The quick brown fox jumps over the lazy dog");
 let hash = hasher.finalize();
 
 assert_eq!(hash, hex!("9004294a361a508c586fe53d1f1b02746765e71b765472786e4770d565830a76"));
+
+// Hex-encode hash using https://docs.rs/base16ct
+let hex_hash = base16ct::lower::encode_string(&hash);
+assert_eq!(hex_hash, "9004294a361a508c586fe53d1f1b02746765e71b765472786e4770d565830a76");
 ```
 
 Also, see the [examples section] in the RustCrypto/hashes readme.