Merge branch '4.4' into 5.1

* 4.4:
  [appveyor] fix checking for the .x branch
  Remove "branch-alias", populate "version"

Author: nicolas-grekas

composer.json

@@ -29,9 +29,9 @@
         ]
     },
     "minimum-stability": "dev",
-    "extra": {
-        "branch-alias": {
-            "dev-master": "5.1-dev"
-        }
-    }
+<<<<<<< HEAD:src/Symfony/Component/Notifier/composer.json
+    "version": "5.1-dev"
+=======
+    "version": "4.4-dev"
+>>>>>>> 4.4:src/Symfony/Component/Debug/composer.json
 }