2.1

PlaywrightWindow:
- Added more methods for returning the html and its elements
- Added getAllHeadersAsJson() method
- Added methods for filling forms
- Added methods for retrieving request/response data
- Added methods for keyboard press/hold and typing text
- Added methods for screenshots and setting the screen/viewport size
- Added js code executing method with returning its result
- Added methods for checking/unchecking checkboxes and radio buttons