Install CodeStan for static analysis

composer.json

@@ -30,12 +30,13 @@
     },
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.0",
-        "codedungeon/phpunit-result-printer": "^0.19.10",
         "bvipul/generator": "^5.6",
+        "codedungeon/phpunit-result-printer": "^0.19.10",
         "filp/whoops": "~2.0",
         "fzaninotto/faker": "~1.4",
         "laravel/browser-kit-testing": "^4.0.0",
         "mockery/mockery": "0.9.*",
+        "nunomaduro/larastan": "^0.3.8",
         "phpunit/phpunit": "~7.0",
         "xethron/migrations-generator": "2.0.2"
     },