chore(deps-dev): update tox requirement from ~=4.16 to ~=4.18 #125

Job	Run time
ios_test (test/functional/ios/search_context/find_by_*.py test/functional/ios/remote_fs_tests.py ...	14m 22s
android_test (test/functional/android/device_time_tests.py test/functional/android/search_context...	7m 35s
ios_test (test/functional/ios/applications_tests.py test/functional/ios/hw_actions_tests.py test/...	14m 42s
android_test (test/functional/android/keyboard_tests.py test/functional/android/location_tests.py...	5m 36s
ios_test (test/functional/ios/screen_record_tests.py test/functional/ios/webdriver_tests.py, func...	12m 44s
android_test (test/functional/android/appium_service_tests.py, func_test_android3)	5m 7s
android_test (test/functional/android/finger_print_tests.py test/functional/android/screen_record...	6m 9s
android_test (test/functional/android/context_switching_tests.py test/functional/android/remote_f...	9m 25s
android_test (test/functional/android/common_tests.py test/functional/android/webelement_tests.py...	4m 59s
android_test (test/functional/android/applications_tests.py, func_test_android7)	6m 5s
android_test (test/functional/android/network_connection_tests.py test/functional/android/log_eve...	4m 33s
	1h 31m 17s

Provide feedback