* Update jest

* Let jest start chromedriver

This makes sure chromedriver always ends even if the test was canceled by the user.

* Properly close browser in production-config test

* Properly close browser in production/security test

* Properly close browser in export test

* Properly close browser in app-aspath test

* Remove taskr from project root

This isn’t needed anymore

* Readd taskr to project root (temporary)

* Improve global setup/teardown

* Properly close browser in basic/client-navigation test

Clicking an target=_blank link will open a second browser window. We can only close this by using broser.quit()

[polka](https://github.com/lukeed/polka/releases/tag/v0.5.0) changed their listen api to be more like express like

* <title> should not be used in _document.js's

* fix style as it was

- compile default pages correctly into `.next`
- add missing runtime dependencies

* Set a default path for wasm modules

* Added the mimetype "application/wasm" for wasm files

* Upgrade write-file-webpack-plugin to 4.4.1

* Made dynamic(import()) in test to dynamic(() => import())

fixes #5355 

As prepare is only needed to boot up the hot reloader + exportPathMap routes in development, it's not longer a requirement in the production server.