ESLint quotes avoidEscape

.eslintrc.js

@@ -19,7 +19,7 @@ module.exports = {
         'no-console': 'warn',
 
         // Stylistic warnings
-        'quotes': ['warn', 'single'],
+        'quotes': ['warn', 'single', {avoidEscape: true}],
         'indent': ['warn', 4],
     },
 };

server.js

@@ -16,7 +16,7 @@ const app = express();
 app.use(helmet({
     contentSecurityPolicy: {
         directives: {
-            defaultSrc: ['\'none\''],
+            defaultSrc: ["'none'"],
         },
     },
     frameguard: {