* Drop dependency on python-telegram-bot, as it's not used.
* Align default templates.
This patch tries to bring some consistency to the default templates and
fixes some small bug in the output of some formatters.
* added timezone fixture
* Make output dependent on local timezone.
* Fix non deterministic behavior in html to text conversion.
Co-authored-by: Giacomo Leidi <goodoldpaul@autistici.org>