feat: export some fetch utilities (nodejs#1632)

Author: KhafraDev

index-fetch.js

@@ -1,7 +1,7 @@
 'use strict'
 
 const { getGlobalDispatcher } = require('./lib/global')
-const fetchImpl = require('./lib/fetch')
+const fetchImpl = require('./lib/fetch').fetch
 
 module.exports.fetch = async function fetch (resource) {
   const dispatcher = (arguments[1] && arguments[1].dispatcher) || getGlobalDispatcher()

index.js

@@ -89,7 +89,7 @@ if (nodeMajor > 16 || (nodeMajor === 16 && nodeMinor >= 8)) {
   let fetchImpl = null
   module.exports.fetch = async function fetch (resource) {
     if (!fetchImpl) {
-      fetchImpl = require('./lib/fetch')
+      fetchImpl = require('./lib/fetch').fetch
     }
     const dispatcher = (arguments[1] && arguments[1].dispatcher) || getGlobalDispatcher()
     try {

lib/fetch/index.js

@@ -2039,4 +2039,9 @@ async function httpNetworkFetch (
   }
 }
 
-module.exports = fetch
+module.exports = {
+  fetch,
+  Fetch,
+  fetching,
+  finalizeAndReportTiming
+}