Merge pull request #66 from hason/patch-require

Require composer/composer only in dev

Author: Naktibalda

composer.json

@@ -20,7 +20,9 @@
     ],
     "require": {
         "php": ">=5.4.0",
-        "composer-plugin-api": "^1.0 || ^2.0",
+        "composer-plugin-api": "^1.0 || ^2.0"
+    },
+    "require-dev": {
         "composer/composer": "^1.0 || ^2.0"
     },
     "extra": {