Update puppeteer

Author: JamesNK

testassets/InteropTestsGrpcWebWebsite/Tests/custom-environment.js

@@ -1,11 +1,20 @@
 const JestPuppeteerEnvironment = require("jest-environment-puppeteer").TestEnvironment;
+
+// expect-puppeteer requires jest's expect to be on the global object
+global.expect = require('expect').expect;
 const expect = require('expect-puppeteer').expect;
 
 class CustomEnvironment extends JestPuppeteerEnvironment {
     // Load page and get test names to run
     async setup() {
         await super.setup();
 
+        // Workaround puppeteer bug
+        // https://github.com/argos-ci/jest-puppeteer/issues/586
+        if (this.global.context.isIncognito === undefined) {
+            this.global.context.isIncognito = () => false;
+        }
+
         console.log('Calling gRPC-Web client app');
 
         var page = this.global.page;