upgrade testfixtures to v4.12.0
upgrade testfixtures to v4.12.0

wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime,wakatime/wakatime