revert: "docs(changelog): fixes wrong versioning [skip ci]"

This reverts commit 47e117a.

Author: tomaski

CHANGELOG.md

@@ -1,5 +1,5 @@
-<a name="4.0.1"></a>
-# [4.0.1](https://github.com/grcrt/grcrt-script/compare/v4.0.0...v4.0.1) (2018-05-18)
+<a name="5.0.0"></a>
+# [5.0.0](https://github.com/grcrt/grcrt-script/compare/v4.0.0...v5.0.0) (2018-05-18)
 
 
 ### Bug Fixes
@@ -8,6 +8,15 @@
 * GRCRT (again) too fast on Firefox ([7792f79](https://github.com/grcrt/grcrt-script/commit/7792f79))
 
 
+### Performance Improvements
+
+* **optimization:** code tweaks ([8cb8b79](https://github.com/grcrt/grcrt-script/commit/8cb8b79))
+
+
+### BREAKING CHANGES
+
+* **optimization:** we now moved to GitHub
+
 <a name="4.0.0"></a>
 # [4.0.0](https://github.com/grcrt/grcrt-script/compare/v3.15.3...v4.0.0) (2018-04-16)