release: 3.3.0 readiness

Updates branch aliases:

- dev-master => 3.3.x-dev
- dev-develop => 4.0.x-dev

Author: weierophinney

composer.json

@@ -50,8 +50,8 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "3.2.x-dev",
-            "dev-develop": "3.3.x-dev"
+            "dev-master": "3.3.x-dev",
+            "dev-develop": "4.0.x-dev"
         },
         "zf": {
             "component": "Zend\\Router",