docs: changelog for 2.2.0

Version 2.1.1

Version 2.1.0

CHANGELOG

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* bug #523 Fix accessing `PantherTestCaseTrait::$webServerDir` before initialization (kbond)

CHANGELOG

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* Allow Symfony 6
* Add type declarations everywhere possible
* Remove Support for Symfony 4.4

CHANGELOG

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* Allow deprecation-contracts 3
* Fix `Form::offsetGet()` return type

Version 1.1.1

Version 1.1.0

Version 1.0.1

Version 1.0.0