Bug fixes and new features from Puppeteer 1.6.
New Features
- Add ElementHandle.isIntersectingViewport() (fa075d6)
- Add reportAnonymousScripts option for JS coverage (cd67702)
- Add blockedbyclient and blockedbyresponse error codes to Request.abort() (e43b8b5)
Bug Fixes / Improvements
- Make waitForNavigation returned response optional (5a62dad)
- Use bs.string for Screenshot.options
_type field (2e7c567)
- Use
Node.Buffer.t instead of Typed_array (5c7ae0d)
