Fix lint and tweak eslint error message

Author: TooTallNate

.eslintrc.js

@@ -20,7 +20,7 @@ module.exports = {
 				'no-restricted-globals': [
 					'error',
 					// https://github.com/TooTallNate/proxy-agents/pull/242
-					{ name: 'URL', message: 'Use url.URL instead' },
+					{ name: 'URL', message: 'Use `URL` from the Node.js "url" module instead.' },
 				],
 			},
 		},

packages/pac-proxy-agent/test/test.ts

@@ -2,6 +2,7 @@ import assert from 'assert';
 import * as fs from 'fs';
 import * as http from 'http';
 import * as https from 'https';
+import { URL } from 'url';
 // @ts-expect-error no types
 import socks from 'socksv5';
 import { listen } from 'async-listen';