Update changelog for 3.6.0 release

Author: acrobat

CHANGELOG-3.X.md

@@ -1,5 +1,16 @@
 # Changelog
 
+## 3.6.0
+
+### Added
+- Include optional params parameter for Commits compare method ([mountiny](https://github.com/mountiny)) [#1053](https://github.com/KnpLabs/php-github-api/issues/1053)
+
+### Changed
+- Update incorrect documentation ([pheeque1](https://github.com/pheeque1)) [#1058](https://github.com/KnpLabs/php-github-api/issues/1058)
+
+### Fixed
+- fix(Apps): use /orgs/ORG/installation ([ellisio](https://github.com/ellisio)) [#1056](https://github.com/KnpLabs/php-github-api/issues/1056)
+
 ## 3.5.1
 
 ### Fixed