Fix: Use one composer.json only

Author: localheinz

composer.json

@@ -20,6 +20,11 @@
   "require": {
     "php": ">=5.4.0"
   },
+  "require-dev": {
+    "EHER/PHPUnit": ">=1.6",
+    "mockery/mockery": ">=0.7.2",
+    "suin/xoopsunit": ">=1.2"
+  },
   "autoload": {
     "psr-0": {
       "Suin\\RSSWriter": "src"