Allow Symfony 6

[1ed]

• Allow Symfony 6
• Add CI for upcoming Symfony versions
• Fix tests with Symfony 6

TODO

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires friends-of-behat/mink ^1.9 -> satisfiable by friends-of-behat/mink[v1.9.0].
    - friends-of-behat/mink v1.9.0 requires symfony/css-selector ^3.4|^4.4|^5.0 -> found symfony/css-selector[v3.4.0-BETA1, ..., 3.4.x-dev, v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require.
  Problem 2
    - Root composer.json requires friends-of-behat/mink-browserkit-driver ^1.5 -> satisfiable by friends-of-behat/mink-browserkit-driver[v1.5.0].
    - friends-of-behat/mink-browserkit-driver v1.5.0 requires symfony/browser-kit ^4.4|^5.0 -> found symfony/browser-kit[v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require.
  Problem 3
    - Root composer.json requires friends-of-behat/mink-extension ^2.5 -> satisfiable by friends-of-behat/mink-extension[v2.5.0].
    - friends-of-behat/mink-extension v2.5.0 requires symfony/config ^3.4 || ^4.4 || ^5.0 -> found symfony/config[v3.4.0-BETA1, ..., 3.4.x-dev, v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require.

• [x] friends-of-behat/mink - https://github.com/FriendsOfBehat/Mink/pull/3
• [ ] friends-of-behat/mink-browserkit-driver
• [ ] friends-of-behat/mink-extension

[Yozhef]

https://github.com/FriendsOfBehat/MinkBrowserKitDriver/pull/12 - support Symfony 6 thank @javer

[Yozhef]

https://github.com/FriendsOfBehat/MinkExtension/pull/11 - support Symfony 6 thank @javer

[Yozhef]

https://github.com/FriendsOfBehat/SymfonyExtension/pull/179 - already finish to merge