Port missing commit from v3.x to master

[ajgarlag]

This PR ports a missing feature from v3.x to master and fix changelog

[migo315]

Thanks four your contribution. I appreciate your help.

As soon as the automatic checks are done (Travis seems to hang at the moment), I will merge the PR and publish a new release.

[migo315]

@ajgarlag There is one test failing, because the event "FilterControllerEvent" was renamed to "ControllerEvent" in Symfony 4/5. Can you fix your test?

1) Flagception\Tests\FlagceptionBundle\Listener\RoutingMetadataSubscriberTest::testRouteWithMultipleFeaturesIsNotActive
Failed asserting that exception of type "PHPUnit\Framework\MockObject\RuntimeException" matches expected exception "Symfony\Component\HttpKernel\Exception\NotFoundHttpException". Message was: "Cannot stub or mock class or interface "Flagception\Tests\FlagceptionBundle\Listener\FilterControllerEvent" which does not exist" at
/home/travis/build/bestit/flagception-bundle/tests/Listener/RoutingMetadataSubscriberTest.php:138

[ajgarlag]

@migo315 The new ControllerEvent class is declared final, so it cannot be mocked. I've instantiated a real event.

[coveralls]

Pull Request Test Coverage Report for Build 221

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 99.165%

---

Totals
Change from base Build 216:	0.002%
Covered Lines:	475
Relevant Lines:	479

---

💛 - Coveralls

[ajgarlag]

@migo315 Test failures are unrelated to this PR. They are related to the new Xdebug 3.

See:

• 6afadd6
• https://travis-ci.org/github/bestit/flagception-bundle/builds/747588452
• https://travis-ci.community/t/xdebug-3-is-installed-by-default-breaking-builds/10748/3
• Fixed issue #1903: Constants should always be available, regardless of which mode Xdebug is in xdebug/xdebug#699

[migo315]

Thanks for your help! Great work! I take a look at the travis build later and merge this PR.