Merge branch '4.4' into 5.0

* 4.4:
  Prepare for stable release

Author: nicolas-grekas

composer.json

@@ -3,7 +3,6 @@
     "type": "project",
     "license": "MIT",
     "description": "A skeleton to start a new Symfony website",
-    "minimum-stability": "dev",
     "require": {
         "php": "^7.2.5",
         "ext-ctype": "*",