Update requirements.txt

[FrankX0]

To resolve issue #229, #238 and #239

[oxivanisher]

Will also fix #231 :)

[bk1285]

Nice to have the color cycling at startup, @FrankX0.

To have that available in a more generic manner, I was wondering, if you'd be ready to add this as an animation in https://github.com/bk1285/rpi_wordclock/blob/main/wordclock_tools/wordclock_display.py#L345

Than you'd need to specify the kind of animation when showing time the first time after startup..: https://github.com/bk1285/rpi_wordclock/blob/main/wordclock_plugins/time_default/plugin.py#L188

In the long run, this short collection of animations shall be extented, refactored + collected in a separate class/file. Idea is to have it available as a collection of effects, which can be used to transition from time n to n+1 but also to animate "special events" such as startup, shutdown, new day, new year, etc.

Best, Bernd

[FrankX0]

Added an extra menu item to configure the sleep timer. All defaults still come from the config file. Changes made in the web-app are runtime only: restarting the clock will load the defaults from the config file again.