What's Changed
* Breaking: starting from this version, by default the browser is not run in headless mode. User need to set `k3d_screenshot_driver_options=["--headless"]` in the configuration file.
* Added `k3d_screenshot_driver_options` configuration option, which can be used to set an headless driver, or to request the driver to use particular settings.
* Added `k3d_screenshot_modify_driver` configuration option.
* Better code organization.