refactor: update code for compliance with new eslint rules

Author: djcsdy

README.md

@@ -110,9 +110,8 @@ caveats when using webpack 4.x in conjunction with ES modules.
 
 Webpack 4.x does not support `webpack.config` files in ES module format, so if
 you set `"type": "module"` in `package.json` then you must mark the
-`webpack.config` file as a CommonJS file by naming it `webpack.config.cjs`
-(with a `.cjs` extension). Of course, you must also use CommonJS format, for
-example:
+`webpack.config` file as a CommonJS file by naming it `webpack.config.cjs` (with
+a `.cjs` extension). Of course, you must also use CommonJS format, for example:
 
 ```js
 const ResolveTypeScriptPlugin = require("resolve-typescript-plugin");
@@ -132,14 +131,14 @@ module.exports = {
 };
 ```
 
-Webpack 4.x also will not discover the `webpack.config` file automatically if
-it is named with a `.cjs` extension, so you must specify the path to the
+Webpack 4.x also will not discover the `webpack.config` file automatically if it
+is named with a `.cjs` extension, so you must specify the path to the
 configuration file explicitly when running webpack, for example:
 `webpack --config ./webpack.config.cjs`.
 
 Webpack 5.x has none of these caveats. In Webpack 5.x, configuration files may
-be in ES Module or CommonJS format, and will be discovered automatically if
-they are named with any of `.js`, `.cjs`, or `.mjs` file extensions.
+be in ES Module or CommonJS format, and will be discovered automatically if they
+are named with any of `.js`, `.cjs`, or `.mjs` file extensions.
 
 ## Feedback
 

test-projects/backward-compatibility-pre-1.1.2-config-cjs/webpack.config.cjs

@@ -1,3 +1,5 @@
+"use strict";
+
 const ResolveTypeScriptPlugin = require("resolve-typescript-plugin").default;
 
 module.exports = {
@@ -7,7 +9,7 @@ module.exports = {
     module: {
         rules: [
             {
-                test: /\.tsx?$/,
+                test: /\.tsx?$/u,
                 use: "ts-loader"
             }
         ]

test-projects/type-module-config-cjs-import-js/webpack.config.cjs

@@ -1,3 +1,5 @@
+"use strict";
+
 const ResolveTypeScriptPlugin = require("resolve-typescript-plugin");
 
 module.exports = {
@@ -7,7 +9,7 @@ module.exports = {
     module: {
         rules: [
             {
-                test: /\.tsx?$/,
+                test: /\.tsx?$/u,
                 use: "ts-loader"
             }
         ]

test-projects/webpack-4-compatibility-type-module/webpack.config.cjs

@@ -1,3 +1,5 @@
+"use strict";
+
 const ResolveTypeScriptPlugin = require("resolve-typescript-plugin").default;
 
 module.exports = {
@@ -7,7 +9,7 @@ module.exports = {
     module: {
         rules: [
             {
-                test: /\.tsx?$/,
+                test: /\.tsx?$/u,
                 use: "ts-loader"
             }
         ]