Add link to release notes

mbrubeck · mbrubeck · commit 6fbff19b27df · 2017-11-30T09:12:12.000-08:00
diff --git a/README.md b/README.md
@@ -3,4 +3,6 @@ rust-smallvec
 
 [Documentation](http://docs.rs/smallvec/)
 
+[Release notes](https://github.com/servo/rust-smallvec/releases)
+
 "Small vector" optimization for Rust: store up to a small number of items on the stack
