Fix lint style changes

app/javascript/packs/frontend.js

@@ -1,8 +1,8 @@
-import React from "react";
-import { render } from "react-dom";
+import React from 'react';
+import {render} from 'react-dom';
 
-document.addEventListener("DOMContentLoaded", () => {
-  import("./frontend/app").then(({ default: App }) => {
+document.addEventListener('DOMContentLoaded', () => {
+  import('./frontend/app').then(({default: App}) => {
     render(<App />, document.querySelector('main[id="app"]'));
   });
 });