puppeteer-dart

Update chrome version to 686378

• Update Chromium version to 669486
• Add an IOSink [output] parameter to [Page.pdf] as an alternative to returning the whole PDF bytes in memory.

• Update Chromium version to 666595
• Remove --disable-gpu flag passed to Chromium on Windows

Update Chromium version to 662092

• Add page.accessibility feature
• Update default Chromium version to 662092

• Add puppeteer.connect to connect to an existing Chromium instance
• Add slowMo parameter for puppeteer.launch et puppeteer.connect to slow down communications with the browser.
• Create Worker from service_worker and shared_worker.
• Use a default viewport of 1280x1024 by default (allow to pass null to disable the default).
• Add a small "plugin" system
• Add the StealthPlugin to automatically applies various techniques to make detection of headless puppeteer harder.
• Add Page.clickAndWaitForNavigation for convenience.
• Add Page.coverage feature
• Add Page.metrics feature
• Add Page.tracing feature

• Add more unit tests and more documentation
• Fix bugs in request interception

• Rename classes Frame, Request & Response to match the puppeteer API
• Add Worker class
• Add more test for the network API

• Add more unit tests and more documentation
• Update default chromium
• Add example for screencast
• Fix bugs