[6.x] update changelog

Author: TBlindaruk

CHANGELOG-6.x.md

@@ -1,6 +1,18 @@
 # Release Notes for 6.x
 
-## [Unreleased](https://github.com/laravel/framework/compare/v6.18.20...6.x)
+## [Unreleased](https://github.com/laravel/framework/compare/v6.18.22...6.x)
+
+
+## [v6.18.22 (2020-06-24)](https://github.com/laravel/framework/compare/v6.18.21...v6.18.22)
+
+### Revert
+- Revert "Fixed `Model::originalIsEquivalent()` with floats ([#33259](https://github.com/laravel/framework/pull/33259), [d68d915](https://github.com/laravel/framework/commit/d68d91516db6d1b9cba8a72f99b2c7e8223e988f))" [bf3cb6f](https://github.com/laravel/framework/commit/bf3cb6f6979df2d6965d2e0aa731724d0e2b15e5)
+
+
+## [v6.18.21 (2020-06-23)](https://github.com/laravel/framework/compare/v6.18.20...v6.18.21)
+
+### Fixed
+- Fixed `Model::originalIsEquivalent()` with floats ([#33259](https://github.com/laravel/framework/pull/33259), [d68d915](https://github.com/laravel/framework/commit/d68d91516db6d1b9cba8a72f99b2c7e8223e988f))
 
 
 ## [v6.18.20 (2020-06-16)](https://github.com/laravel/framework/compare/v6.18.19...v6.18.20)