Merge branch '4.4' into 5.0

* 4.4:
  Parse and render anonymous classes correctly on php 8
  Enable APCu for the php 8 build.
  [Process] Fix failing test on php 8.
  [HttpKernel] fix test
  Make PHP 8 green on Travis
  Revert "[Cache] allow DBAL v3"
  [PropertyAccessor] Added missing property path on php 8.
  Don't execute tests with DBAL 2.x on php 8.

Author: nicolas-grekas

composer.json

@@ -16,7 +16,9 @@
         }
     ],
     "require": {
-        "php": ">=7.2.5"
+        "php": ">=7.2.5",
+        "psr/log": "^1.0",
+        "symfony/polyfill-php80": "^1.15"
     },
     "conflict": {
         "symfony/http-kernel": "<4.4"