add music plugin

added music plugin on taki's request

Author: lorenzo132

plugins/registry.json

@@ -17,6 +17,15 @@
         "icon_url": "https://cdn1.iconfinder.com/data/icons/web-hosting-2-4/52/200-512.png",
         "thumbnail_url": "https://cdn1.iconfinder.com/data/icons/web-hosting-2-4/52/200-512.png"
     },
+    "Music": {
+        "repository": "Taaku18/modmail-plugins",
+        "branch": "master",
+        "description": "Play wonderfull jams through your modmail!",
+        "bot_version": "2.20.1",
+        "title": "Music",
+        "icon_url": "https://i.imgur.com/JmJPX5W.gif",
+        "thumbnail_url": "https://i.imgur.com/jrYL7F8.gif"
+    },
     "media-only": {
         "repository": "lorenzo132/modmail-plugins",
         "branch": "master",