Update changelog for 4.0.0 release

Author: Airsaid

CHANGELOG.md

@@ -164,7 +164,8 @@
 ## [1.0.0] (2018-09-24)
 - Initial release of the plugin.
 
-[Unreleased]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v3.0.0...HEAD
+[Unreleased]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v3.0.0...v4.0.0
 [3.0.0]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v2.9.0...v3.0.0
 [2.9.0]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v2.8.0...v2.9.0
 [2.8.0]: https://github.com/Airsaid/AndroidLocalizePlugin/compare/v2.7.0...v2.8.0