Pyppeteer

* Add `ElementHandle.isIntersectingViewport()`
* Add `reportAnonymousScript` option to `Coverage.startJSCoverage()`
* Add `Page.waitForRequest` and `Page.waitForResponse` methods
* Now possible to attach to extension background pages with `Target.page()`
* Improved reliability of clicking with `Page.click()` and `ElementHandle.click()`

* Add `BrowserContext` class
* Add `Worker` class
* Change `CDPSession.send` to a normal function which returns awaitable value
* Add `Page.isClosed` method
* Add `ElementHandle.querySelectorAllEval` and `ElementHandle.JJeval`
* Add `Target.opener`
* Add `Request.isNavigationRequest`

* Add `pyppeteer.DEBUG` variable
* Add `Page.browser`
* Add `Target.browser`
* Add `ElementHandle.querySelectorEval` and `ElementHandle.Jeval`
* Add `runBeforeUnload` option to `Page.close` method
* Change `Page.querySelectorEval` to raise `ElementHandleError` when element which matches `selector` is not found
* Report 'Log' domain entries as 'console' events
* Fix `Page.goto` to return response when page pushes new state
* (OS X) Suppress long log when extracting chromium

* Add `pyppeteer-install` command
* Add `autoClose` option to `launch` function
* Add `loop` option to `launch` function (experimental)
* Add `Page.setBypassCSP` method
* `Page.tracing.stop` returns result data
* Rename `documentloaded` to `domcontentloaded` on `waitUntil` option
* Fix `slowMo` option
* Fix anchor navigation
* Fix to return response via redirects
* Continue to find WS URL while process is alive

* Add `ElementHandle.contentFrame` method
* Add `Request.redirectChain` method
* `Page.addScriptTag` accepts a new option `type`

* Add `Page.waitForXPath` and `Frame.waitForXPath`
* `Page.waitFor` accepts xpath string which starts with `//`
* Add `Response.fromCache` and `Response.fromServiceWorker`
* Add `SecurityDetails` class and `response.securityDetails`
* Add `Page.setCacheEnabled` method
* Add `ExecutionContext.frame`
* Add `dumpio` option to `launch` function
* Add `slowMo` option to `connect` function
* `launcher.connect` can be access from package top
* `from pyppeteer import connect` is now valid
* Add `Frame.evaluateHandle`
* Add `Page.Events.DOMContentLoaded`