Bump dev-master to 0.3.x-dev

Author: jmikola

README.md

@@ -36,7 +36,7 @@ The preferred method of installing this library is with
 [Composer](https://getcomposer.org/) by running the following from your project
 root:
 
-    $ composer require "mongodb/mongodb=0.2.x-dev"
+    $ composer require "mongodb/mongodb=0.3.x-dev"
 
 ## Reporting Issues
 

composer.json

@@ -18,7 +18,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "0.2.x-dev"
+            "dev-master": "0.3.x-dev"
         }
     }
 }