Add 3.x changelog

Author: acrobat

CHANGELOG-3.X.md

@@ -0,0 +1,23 @@
+# Changelog
+
+## 3.0.0
+
+### Added
+- Switch to PSR18 client implementation and bump httplug minimum version to ^2.0 ([GrahamCampbell](https://github.com/GrahamCampbell)) [#885](https://github.com/KnpLabs/php-github-api/issues/885)
+- Switch to PSR-17 and remove deprecated code ([GrahamCampbell](https://github.com/GrahamCampbell)) [#888](https://github.com/KnpLabs/php-github-api/issues/888)
+- Allow PHP8 ([acrobat](https://github.com/acrobat)) [#934](https://github.com/KnpLabs/php-github-api/issues/934)
+- [3.x] Make PHP 7.2.5 the minimum version ([GrahamCampbell](https://github.com/GrahamCampbell)) [#942](https://github.com/KnpLabs/php-github-api/issues/942)
+- [3.x] Re-worked pagination to not mutate the api classes ([GrahamCampbell](https://github.com/GrahamCampbell)) [#907](https://github.com/KnpLabs/php-github-api/issues/907)
+- Prepare 3.0 release and remove remaining deprecated code ([acrobat](https://github.com/acrobat)) [#948](https://github.com/KnpLabs/php-github-api/issues/948)
+
+### Changed
+- Remove BC check on 3.x ([GrahamCampbell](https://github.com/GrahamCampbell)) [#900](https://github.com/KnpLabs/php-github-api/issues/900)
+- Fixed 2.x -> master merge ([GrahamCampbell](https://github.com/GrahamCampbell)) [#901](https://github.com/KnpLabs/php-github-api/issues/901)
+- [3.x] Fix the HTTP methods client ([GrahamCampbell](https://github.com/GrahamCampbell)) [#910](https://github.com/KnpLabs/php-github-api/issues/910)
+- fix typo ([michielkempen](https://github.com/michielkempen)) [#920](https://github.com/KnpLabs/php-github-api/issues/920)
+- [3.x] Fixed bad merge ([GrahamCampbell](https://github.com/GrahamCampbell)) [#950](https://github.com/KnpLabs/php-github-api/issues/950)
+- [3.x] Added some additional scalar types and return types ([GrahamCampbell](https://github.com/GrahamCampbell)) [#949](https://github.com/KnpLabs/php-github-api/issues/949)
+
+### Fixed
+- [3.x] Use RFC3986 for building URI query strings ([GrahamCampbell](https://github.com/GrahamCampbell)) [#906](https://github.com/KnpLabs/php-github-api/issues/906)
+- Fixed issues with ResultPager and various github responses ([acrobat](https://github.com/acrobat)) [#956](https://github.com/KnpLabs/php-github-api/issues/956)