Use `email.utils.format_datetime` instead of undocumented `wsgiref.handlers.format_date_time` (#148)
Use `email.utils.format_datetime` instead of undocumented `wsgiref.handlers.format_date_time` (#148)

* Use documented API `email.utils.format_datetime`

instead of undocumented `wsgiref.handlers.format_date_time`
python-hyper/h11