Check and save multiple Vary Headers (#108)

Test all Vary Headers for existing and don't replace when multiple

Bump version to 2.2-dev

Remove 7.1

Ignore line length

Update CorsService.php

Allow Symfony 6 (#96)

Do not check isSameHost (#84)

PHP 8 Support (#83)

* PHP 8 Support

* Fix whitespace issue

* Run builds on Pull Requests

Reflect headers/methods instead of wildcard (#81)

Add typehints (#78)

* Add typehints