Update to TOML v0.4.0

Author: pelletier

README.md

@@ -3,7 +3,7 @@
 Go library for the [TOML](https://github.com/mojombo/toml) format.
 
 This library supports TOML version
-[v0.2.0](https://github.com/mojombo/toml/blob/master/versions/toml-v0.2.0.md)
+[v0.4.0](https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.4.0.md)
 
 [![GoDoc](https://godoc.org/github.com/pelletier/go-toml?status.svg)](http://godoc.org/github.com/pelletier/go-toml)
 [![Build Status](https://travis-ci.org/pelletier/go-toml.svg?branch=master)](https://travis-ci.org/pelletier/go-toml)