Bump version to v0.4.5

CHANGELOG.md

+# 0.4.5 (August 12, 2017)
+
+* Fix range bug in `Take::bytes`
+* Misc performance improvements
+* Add extra `PartialEq` implementations.
+* Add `Bytes::with_capacity`
+* Implement `AsMut[u8]` for `BytesMut`
+
 # 0.4.4 (May 26, 2017)
 
 * Add serde support behind feature flag

Cargo.toml

 [package]
 
 name          = "bytes"
-version       = "0.4.4"
+version       = "0.4.5"
 license       = "MIT/Apache-2.0"
 authors       = ["Carl Lerche <me@carllerche.com>"]
 description   = "Types and traits for working with bytes"