TASK: Added composer/composer as required package for development

composer.json

@@ -25,6 +25,9 @@
   "require": {
     "composer-plugin-api": "^1.1"
   },
+  "require-dev": {
+    "composer/composer": "^1.4"
+  },
   "extra": {
     "class": "Higidi\\ComposerPhpCSStandardsPlugin\\Plugin"
   }