Use url-parse for node 6 support

Author: jeffposnick

package-lock.json

@@ -54,6 +54,7 @@
     "webpack": ">=3.2.0"
   },
   "dependencies": {
-    "@babel/runtime": "^7.0.0-beta.49"
+    "@babel/runtime": "^7.0.0-beta.49",
+    "url-parse": "^1.4.1"
   }
 }

package.json

@@ -17,7 +17,8 @@
 
 const assert = require('assert');
 const path = require('path');
-const {URL} = require('url');
+// The first-party 'url' module isn't available in node 6.
+const URL = require('url-parse');
 
 function determineAsValue({optionsAs, href}) {
   assert(href, `The 'href' parameter was not provided.`);

src/lib/determine-as-value.js

@@ -19,7 +19,7 @@ function extractChunks({compilation, optionsInclude}) {
   try {
     // 'asyncChunks' are chunks intended for lazy/async loading usually generated as
     // part of code-splitting with import() or require.ensure(). By default, asyncChunks
-    // get wired up using link rel=preload when using this plugin. This behaviour can be
+    // get wired up using link rel=preload when using this plugin. This behavior can be
     // configured to preload all types of chunks or just prefetch chunks as needed.
     if (optionsInclude === undefined || optionsInclude === 'asyncChunks') {
       return compilation.chunks.filter(chunk => {