Modernize Axe class implementation#202

OlenaYefymenko wants to merge 4 commits intoaxe-selenium-python:mainaxe-selenium-python/axe-selenium-python:mainfrom

OlenaYefymenko:update-axe-add-new-testsOlenaYefymenko/axe-selenium-python:update-axe-add-new-testsCopy head branch name to clipboard