Prepare 3.4.0 release

Author: akhilles

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "crc"
-version = "3.3.0"
+version = "3.4.0"
 authors = ["Rui Hu <code@mrhooray.com>", "Akhil Velagapudi <4@4khil.com>"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"

README.md

@@ -12,7 +12,7 @@ Rust implementation of CRC.
 Add `crc` to `Cargo.toml`
 ```toml
 [dependencies]
-crc = "3.3.0"
+crc = "3.4.0"
 ```
 
 ### Examples