Updates branch aliases

- dev-master => 1.4.x-dev
- dev-develop => 1.5.x-dev
- dev-release-2.0.0 => 2.0.x-dev

Author: weierophinney

composer.json

@@ -49,8 +49,9 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "1.4-dev",
-            "dev-develop": "1.5-dev"
+            "dev-master": "1.4.x-dev",
+            "dev-develop": "1.5.x-dev",
+            "dev-release-2.0.0": "2.0.x-dev"
         }
     },
     "scripts": {