message: Update CHANGELOG.md 0.27.0
diff: # Changelog
  +## 0.27.0
  +
  +- Added support for [Spread Assignment](https://basarat.gitbooks.io/typescript/content/docs/spread-operator.html) statements.
  +- Changed Map and Set implementations to they preserve insertion order when iterated over, as specified by ECMAScript.
  +
  +- Fixed an issue with [/** @luaTable */](https://github.com/TypeScriptToLua/TypeScriptToLua/wiki/Compiler-Directives#luaTable) variable names disappearing.
  +- Fixed for-in loops throwing an error when using a pre-defined variable.
  +- Fixed issue with initialization order of class properties.
  +
  +- Simplified enum transformation code.
  +
  ## 0.26.0
  - Added support for [default exports and export equals statements](https://github.com/Microsoft/TypeScript/issues/7185#issuecomment-421632656).
  