Add maintainability badge to README

Author: tomasbasham

README.md

@@ -1,4 +1,4 @@
-# ember-cli-adapter-pattern [![Build Status](https://travis-ci.com/tomasbasham/ember-cli-adapter-pattern.svg?branch=master)](https://travis-ci.com/tomasbasham/ember-cli-adapter-pattern)
+# ember-cli-adapter-pattern [![Build Status](https://travis-ci.com/tomasbasham/ember-cli-adapter-pattern.svg?branch=master)](https://travis-ci.com/tomasbasham/ember-cli-adapter-pattern) [![Maintainability](https://api.codeclimate.com/v1/badges/56fc7fabc8e2cb29e1d0/maintainability)](https://codeclimate.com/github/tomasbasham/ember-cli-adapter-pattern/maintainability)
 
 An [Ember CLI](https://ember-cli.com/) addon to standardise a common adapter
 pattern.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ember-cli-adapter-pattern",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "An ember-cli addon to standardise a common adapter pattern",
   "keywords": [
     "ember-addon",