driver updates and internal methods
- Make convenience updates to "driver.find_element()"
--> This resolves #2122 - Prevent "StaleElementReferenceException" with "js_click()"
--> This resolves #2124 - Make "__check_browser()" a non-private method
--> This resolves #2123 - Add option: --driver-version="keep"
--> This resolves #2121 - Refresh Python dependencies