Revert "Merge pull request #124 from phansys/upgrade_3.x"

This reverts commit dabad8d, reversing
changes made to 36f0493.

Author: phansys

composer.json

@@ -72,7 +72,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.1-dev"
+            "dev-master": "3.x-dev"
         }
     }
 }