Revert convert to esm (#544)

* Revert "update got dependency and convert to esm module (#533)"

This reverts commit 77efb36ae3.

* keep new local test file changes

* keep changes to PR template

* update changelog

src/auth.js

@@ -1,8 +1,8 @@
 // @ts-check
-import core from '@actions/core';
-import * as fs from 'fs';
-import got from 'got';
-import rsasign from 'jsrsasign';
+const core = require('@actions/core');
+const rsasign = require('jsrsasign');
+const fs = require('fs');
+const { default: got } = require('got');
 
 const defaultKubernetesTokenPath = '/var/run/secrets/kubernetes.io/serviceaccount/token'
 /***
@@ -154,6 +154,6 @@ async function getClientToken(client, method, path, payload) {
  * }} auth
  */
 
-export {
+module.exports = {
     retrieveToken,
 };