chore(eslint): modernize configuration

Author: Kocal

.eslintrc.js

@@ -1,9 +1,10 @@
-const { generateConfig } = require('@kocal/eslint-config-generator');
-
-const config = generateConfig();
-
-// We don't need @babel/eslint-parser as we don't use Babel
-delete config.parser;
-delete config.parserOptions;
-
-module.exports = config;
+/** @type {import('eslint').BaseConfig} */
+module.exports = {
+  root: true,
+  env: {
+    browser: true,
+    node: true,
+    es2021: true,
+  },
+  extends: ['eslint:recommended', 'eslint-config-prettier'],
+};

tests/Bridge/JavaScript/index.test.js

@@ -1,15 +1,20 @@
 const { isMessageEvent } = require('../../../src/Bridge/JavaScript');
 
-describe('javaScript bridge', function () {
-  describe('isMessageEvent()', function () {
-    it('checks if passed argument is a valid MessageEvent', function () {
+describe('javaScript bridge', function() {
+  describe('isMessageEvent()', function() {
+    it('checks if passed argument is not a valid MessageEvent', function() {
       expect.assertions(6);
 
       expect(isMessageEvent()).toBeFalsy();
       expect(isMessageEvent('foo')).toBeFalsy();
       expect(isMessageEvent(123)).toBeFalsy();
       expect(isMessageEvent(null)).toBeFalsy();
       expect(isMessageEvent({})).toBeFalsy();
+    });
+
+    it('checks if passed argument is a valid MessageEvent', function() {
+      expect.assertions(1);
+
       expect(
         isMessageEvent({
           message: null,