Update Selenium to version 4
Selenium 3 was throwing deprecation warnings which have been solved by this update. I've also updated the geckodriver version in python-geckodriver to support Selenium 4.
Part of #297
Selenium 3 was throwing deprecation warnings which have been solved by this update. I've also updated the geckodriver version in python-geckodriver to support Selenium 4.
Part of #297
added Upgrade dependency label
merged