Update license and use uv to build

parse_days() should return set() not list()

Change to f-strings

Fix invocation on same time

Update to version 1.5

Fix installation issues

Add link to Arch AUR package

Add oneshot_on_days() and repeat_on_days()

This provides more "cron-like" capability so e.g. you can specify a
repeat (or oneshot) for a given time on a set of given days of the week.

Initial commit