Update branch-alias to 1.x-dev

Author: chalasr

composer.json

@@ -48,7 +48,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "0.11.x-dev"
+            "dev-master": "1.x-dev"
         }
     },
     "minimum-stability": "dev"