PuppeteerSharp 1.6.0

# New Features * Support thrown strings and numbers in getExceptionMessage. * Implement PageError event from a worker. * Click wrapped links support. * Add an option to collect coverage of anonymous scripts. * ElementHandle.IsIntersectingViewportAsync and Offsetclicks. # New APIs * Page.WaitForRequestAsync and Page.WaitForResponseAsync. # Breaking Changes * Remove throw in case of empty elementHandle. * EvaluateFunctionAsync and EvaluateFunctionAsync now will throw and EvaluationFailedException. # Changelog * Roll Chromium to r571375. * Migrate exposeFunction from console.debug to Runtime.installBinding. * Don't pass a reference to the page into frames. * Simplify EmulationManager. * Clarify docs about waitForNavigation. * Add new error reasons for request.abort(). * Fix random tests flakiness. * Test that verifies pptr works with SVG nodes. * Nicer protocol error messages. * Add support for target.page for 'backgroud_page'. * New devices. * Fix race condition in WaitTask. * Make Payload constructor Public. * Fix ContinueAsync payload override.