Use array reduce instead of forEach

app/assets/javascripts/protected_tags/protected_tag_edit.js

@@ -40,13 +40,14 @@ export default class ProtectedTagEdit {
   }
 
   updatePermissions() {
-    const formData = {};
-
-    Object.keys(ACCESS_LEVELS).forEach((level) => {
+    const formData = Object.keys(ACCESS_LEVELS).reduce((acc, level) => {
+      /* eslint-disable no-param-reassign */
       const accessLevelName = ACCESS_LEVELS[level];
+      const inputData = this[`${accessLevelName}_dropdown`].getInputData(accessLevelName);
+      acc[`${accessLevelName}_attributes`] = inputData;
 
-      formData[`${accessLevelName}_attributes`] = this[`${accessLevelName}_dropdown`].getInputData(accessLevelName);
-    });
+      return acc;
+    }, {});
 
     return $.ajax({
       type: 'POST',