switch to cronsim for cron parsing #39
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Avoid DST related bugs.
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Avoid DST related bugs, such as those reported in #7.
CronSim is an alternative implementation of cron parsing in python and was (according to its documentation) explicitly designed to follow Debian's cron implementation, including the DST behavior.
My tests look quite promising and the issues I had noticed vanished using no
tzparameter. Passing a zoneinfo timezone to the crontab decorator worked, as well asdateutil.tz.tzlocal().Unfortunately, this is a breaking change since I had to remove
croniter_kwargs, of course.