Some improvements
- Fix a bug with getting the latest milestone driver version
- Fix a bug with "invalid session id"
- Add "replica" to --env=ENV options
- Improve error-handling with UC Mode
- Update the algorithm that decides if UC Mode calls reconnect()
- Make improvements to "driver.uc_click(selector)" (UC Mode only)
- Add a customizable "timeout" arg to "highlight()" methods
- Refresh Python dependencies
- Update the documentation
- Update example tests