add the repo url

Author: ekratskih

package.json

@@ -3,6 +3,9 @@
   "version": "1.1.33",
   "description": "",
   "main": "index.es6.js",
+  "repository": {
+    "url": "https://github.com/b12io/metronome"
+  },
   "scripts": {
     "test": "jest",
     "start": "NODE_OPTIONS=--openssl-legacy-provider webpack-dev-server --mode development",