v1.1.0

Features:

• Add support for symfony/panther:~2.0 and symfony ~6.0.
• Add support for PHP 8.1.
• Drop support for PHP 7.1 cause of too much maintenance afford. Stick with v1.0.8 if you want to use PHP 7.1.
• Enable RadioTest::testIsChecked #11 and RadioTest::testSetValue #10 as soon as symfony/panther#v2.0.2 ist out.
  See related PR: symfony/panther#526

Misc:

• Use GitHub Actions instead of Travis CI for continuous integration. #22
• Rename branch master to main cause black lives matter. #26 #27