Merge pull request #58 from reactphp/remove-branch-alias

Remove branch-alias definition as per reactphp/reactphp#343

Author: clue

composer.json

@@ -14,10 +14,5 @@
         "psr-4": {
             "React\\Http\\": "src"
         }
-    },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "0.5-dev"
-        }
     }
 }