Use CJS insteam of ESM

It makes more sense for now.

Author: BlitzBanana

README.md

@@ -19,7 +19,7 @@ Add the plugin to your webpack config.
 
 ```js
 // webpack.config.js
-const hooksScriptPlugin = require('webpack-hooks-shellscripts').default
+const hooksScriptPlugin = require('webpack-hooks-shellscripts')
 
 module.exports = {
   plugins: [

src/index.d.ts

@@ -1 +1,3 @@
-export default function plugin(scripts: object): void
+declare function hooksShellScriptsPlugin(scripts: object): void
+
+export = hooksShellScriptsPlugin

src/index.js

@@ -1,5 +1,5 @@
-import execa from 'execa'
-import pMapSeries from 'p-map-series'
+const execa = require('execa')
+const pMapSeries = require('p-map-series')
 
 const PLUGIN_NAME = 'HooksShellScriptsPlugin'
 
@@ -30,6 +30,8 @@ const registerHook = compiler => ([hook, scripts]) =>
  *  }
  * ```
  */
-export default (scripts = {}) => ({
+const hooksShellScriptsPlugin = (scripts = {}) => ({
   apply: compiler => Object.entries(scripts).map(registerHook(compiler))
 })
+
+module.exports = hooksShellScriptsPlugin