Linting fixes for frontend following eslint package upgrade

frontend/src/Settings/Metadata/MetadataSettings.js

@@ -27,17 +27,17 @@ class MetadataSettings extends Component {
 
   onChildMounted = (saveCallback) => {
     this._saveCallback = saveCallback;
-  }
+  };
 
   onChildStateChange = (payload) => {
     this.setState(payload);
-  }
+  };
 
   onSavePress = () => {
     if (this._saveCallback) {
       this._saveCallback();
     }
-  }
+  };
 
   //
   // Render