Install bundle as authserver plugin

composer.json

@@ -1,6 +1,8 @@
 {
     "name": "vierbergenlars/authserver-external-account-bundle",
+    "description": "Authserver external accounts plugin.",
     "license": "AGPL",
+    "type": "authserver-plugin",
     "authors": [
         {
             "name": "Lars Vierbergen",
@@ -8,5 +10,7 @@
         }
     ],
     "minimum-stability": "stable",
-    "require": {}
+    "require": {
+        "vierbergenlars/authserver-installer": "^1.0"
+    }
 }