Merge branch '5.4' into 6.0

* 5.4:
  Fix URL to get composer.phar
  Fix appveyor
  [TwigBridge] Fix the build

Author: nicolas-grekas

composer.json

@@ -33,7 +33,6 @@
         "symfony/http-kernel": "^5.4|^6.0",
         "symfony/messenger": "^5.4|^6.0",
         "symfony/doctrine-messenger": "^5.4|^6.0",
-        "symfony/phpunit-bridge": "^5.4|^6.0",
         "symfony/property-access": "^5.4|^6.0",
         "symfony/property-info": "^5.4|^6.0",
         "symfony/proxy-manager-bridge": "^5.4|^6.0",