[js] Fix database cleanup function

lib/modules/database/index.js

@@ -105,7 +105,7 @@ export default class Database extends Base {
     const promises = [];
     Object.keys(this.references).forEach((refId) => {
       const ref = this.references[refId];
-      promises.push(this.off(refId, ref.listeners, 0));
+      promises.push(this.off(Number(refId), Object.values(ref.listeners), 0));
     });
     return Promise.all(promises);
   }