Fix ESLint errors

Author: alexesprit

index.js

@@ -1,8 +1,5 @@
-'use strict';
-
 const { baseRules, jsOverrides, vueOverrides } = require('./rules');
 
-module.exports = {
-	...baseRules,
+module.exports = Object.assign({}, baseRules, {
 	overrides: [jsOverrides, vueOverrides],
-};
+});

rules.js

@@ -1,5 +1,3 @@
-'use strict';
-
 const baseRules = {
 	env: {
 		es6: true,

typescript.js

@@ -1,13 +1,10 @@
-'use strict';
-
 const {
 	baseRules,
 	jsOverrides,
 	tsOverrides,
 	vueOverrides,
 } = require('./rules');
 
-module.exports = {
-	...baseRules,
+module.exports = Object.assign({}, baseRules, {
 	overrides: [jsOverrides, tsOverrides, vueOverrides],
-};
+});