Add CS fixer to dev dependencies

composer.json

@@ -38,6 +38,7 @@
     },
     "require-dev": {
         "adlawson/timezone": "~1.0",
+        "fabpot/php-cs-fixer": "~0.5",
         "mockery/mockery": "~0.9",
         "phpunit/phpunit": "~4.0"
     }