[composer] add support section.

fixes php-enqueue/enqueue-dev#288

Author: makasim

composer.json

@@ -20,6 +20,13 @@
         "enqueue/fs": "^0.8@dev",
         "enqueue/test": "^0.8@dev"
     },
+    "support": {
+        "email": "[email protected]",
+        "issues": "https://github.com/php-enqueue/enqueue-dev/issues",
+        "forum": "https://gitter.im/php-enqueue/Lobby",
+        "source": "https://github.com/php-enqueue/enqueue-dev",
+        "docs": "https://github.com/php-enqueue/enqueue-dev/blob/master/docs/index.md"
+    },
     "suggest": {
         "symfony/dependency-injection": "^2.8|^3|^4 If you'd like to use async event dispatcher container extension."
     },