fix(typescript): ref dom lib via triple-slash to fix some compile issues

closes #126

src/runtime/node/fetch.ts

@@ -1,5 +1,6 @@
 import { get as http } from 'http'
 import type { ClientRequest } from 'http'
+import type { URL as URLtype } from 'url'
 import { get as https, RequestOptions } from 'https'
 
 import type { FetchFunction } from '../interfaces.d'
@@ -19,7 +20,7 @@ const fetch: FetchFunction = async (url: URL, timeout: number, options: Accepted
   }
   return new Promise((resolve, reject) => {
     const { agent } = options
-    protocols[url.protocol](url, { agent, timeout }, async (response) => {
+    protocols[url.protocol](<URLtype>url, { agent, timeout }, async (response) => {
       if (response.statusCode !== 200) {
         reject(new JOSEError('Expected 200 OK from the JSON Web Key Set HTTP response'))
       } else {

src/types.d.ts

@@ -1,3 +1,5 @@
+/// <reference lib="dom"/>
+
 /* eslint-disable @typescript-eslint/naming-convention */
 import type { KeyObject } from 'crypto'
 

tsconfig/base.json

@@ -30,6 +30,7 @@
     "../src/util/random.ts"
   ],
   "compilerOptions": {
+    "lib": ["ES6"],
     "strict": true,
     "forceConsistentCasingInFileNames": true,
     "noUnusedLocals": true,