Merge branch '7.3' into 7.4

* 7.3:
  Bump phpunit-bridge to ^7.4|^8.0

Author: nicolas-grekas

composer.json

@@ -157,7 +157,7 @@
         "seld/jsonlint": "^1.10",
         "symfony/amphp-http-client-meta": "^1.0|^2.0",
         "symfony/mercure-bundle": "^0.3",
-        "symfony/phpunit-bridge": "^6.4|^7.0|^8.0",
+        "symfony/phpunit-bridge": "^7.4|^8.0",
         "symfony/runtime": "self.version",
         "symfony/security-acl": "~2.8|~3.0",
         "symfony/webpack-encore-bundle": "^1.0|^2.0",