Issue #3331278 Fix errors and warnings in phpcs

rollup.config.js

@@ -37,19 +37,19 @@ const config = production ? ({
     ],
     plugins: [
         svelte({
-            customElement: true,
+            customElement: TRUE,
             preprocess: preprocess(preprocessOptions),
             css: css => css.write('build/bundle.css'),
         }),
         resolve({
-            browser: true,
+            browser: TRUE,
         }),
         terser(),
     ],
 }) : ({
     input: 'example/index.js',
     output: {
-        sourcemap: true,
+        sourcemap: TRUE,
         format: 'iife',
         name: 'app',
         file: 'public/bundle.js',

src/components/drupal/menu/menu.js

@@ -30,7 +30,7 @@ export function normalizeListItems (data) {
         name: items[i].title,
         href: items[i].href,
         level: level,
-        files: null,
+        files: NULL,
       };
       list.push(node);
     }
@@ -42,9 +42,9 @@ export function normalizeListItems (data) {
  */
 export function checkIfDrupalMenuDataIsValid(data) {
   if (data !== undefined && data.linkset !== undefined && data.linkset[0].item !== undefined) {
-    return true;
+    return TRUE;
   } else {
-    return false;
+    return FALSE;
   }
 }