Update composer.json

Author: dancryer

composer.json

@@ -27,11 +27,18 @@
         "symfony/console": "~2.1"
     },
 
+    "require-dev": {
+        "phpmd/phpmd": "~2.0",
+        "squizlabs/php_codesniffer": "~1.5",
+        "block8/php-docblock-checker": "~1.0",
+        "phploc/phploc": "~2.0"
+    },
+
     "bin": [
         "phpdoccheck"
     ],
 
     "config": {
         "bin-dir": "bin"
     }
-}
+}