Update to Puppeteer 9

This is the latest version that supports Node.js 10. It comes with
a significantly newer Chromium version and many other internal changes,
including a fix for Apple M1 devices.

https://github.com/puppeteer/puppeteer/releases/tag/v6.0.0
* roll Chromium to 89.0.

https://github.com/puppeteer/puppeteer/releases/tag/v7.0.0
* roll Chromium to 90.0.
* `page.screenshot()` cuts by ViewPort size, not position.

https://github.com/puppeteer/puppeteer/releases/tag/v8.0.0
* renamed type ChromeArgOptions to BrowserLaunchArgumentOptions.
* renamed type BrowserOptions to BrowserConnectOptions.

https://github.com/puppeteer/puppeteer/releases/tag/v9.0.0
* roll Chromium to 91.0.
* filechooser: `FileChooser.cancel()` is now synchronous.
* fix install error on Apple M1 devices.

Fixes #184.
Closes #185.

package.json

@@ -18,7 +18,7 @@
   "dependencies": {
     "eventemitter2": "^6.4.2",
     "p-each-series": "^2.1.0",
-    "puppeteer": "^5.0.0"
+    "puppeteer": "^9.0.0"
   },
   "devDependencies": {
     "difflet": "^1.0.1",

tasks/qunit.js

@@ -393,7 +393,7 @@ module.exports = function(grunt) {
             // let the useless "JSHandle" through and rely on developers to stringify any
             // useful information ahead of time, e.g. `console.warn(String(err))`.
             //
-            // Ref https://pptr.dev/#?product=Puppeteer&version=v5.0.0&show=api-class-consolemessage
+            // Ref https://pptr.dev/#?product=Puppeteer&version=v9.0.0&show=api-class-consolemessage
             var colors = {
               'error': 'red',
               'warning': 'yellow'
@@ -406,7 +406,7 @@ module.exports = function(grunt) {
         }
 
         // Surface uncaught exceptions
-        // Ref https://pptr.dev/#?product=Puppeteer&version=v5.0.0&show=api-event-pageerror
+        // Ref https://pptr.dev/#?product=Puppeteer&version=v9.0.0&show=api-event-pageerror
         page.on('pageerror', function(err) {
           eventBus.emit('error.onError', err);
         });