Fix CHANGELOG after v0.12.0 release.

Author: nwronski

CHANGELOG.md

@@ -3,7 +3,7 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased][unreleased]
 
-## [v0.12.0-beta.1] - 2015-09-29
+## [v0.12.0] - 2015-09-29
 ### Changed
 - `all` keys removed in all places as it has no effect on query results
 - function `args` property now always contains an array. when `DISTINCT` is used in function arguments, then a `distinct: true` property is added to the function node.
@@ -429,8 +429,8 @@ All notable changes to this project will be documented in this file.
 ### Added
 - First working version of sqlite-parser
 
-[unreleased]: https://github.com/codeschool/sqlite-parser/compare/v0.12.0-beta.1...HEAD
-[v0.12.0-beta.1]: https://github.com/codeschool/sqlite-parser/compare/v0.10.2...v0.12.0-beta.1
+[unreleased]: https://github.com/codeschool/sqlite-parser/compare/v0.12.0...HEAD
+[v0.12.0]: https://github.com/codeschool/sqlite-parser/compare/v0.10.2...v0.12.0
 [v0.10.2]: https://github.com/codeschool/sqlite-parser/compare/v0.9.8...v0.10.2
 [v0.9.8]: https://github.com/codeschool/sqlite-parser/compare/v0.9.1...v0.9.8
 [v0.9.1]: https://github.com/codeschool/sqlite-parser/compare/v0.8.0...v0.9.1