Croniter

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- document seconds repeats, fixes 122
[kiorky]
- Implement match method, fixes 54
[kiorky]
- Adding tests for 127 (test more DSTs and croniter behavior around)
[kiorky]
- Changed lag_hours comparison to absolute to manage dst boundary when getting previous
[Sokkka]

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- Fix get_next() when start_time less then 1s before next instant
[AlexHill]

-------------------

- credits

-------------------

- credits
- history stripping (security)
- Handle -Sun notation, This fixes `119 <https://github.com/taichino/croniter/issues/119>`_.
[kiorky]
- Handle invalid ranges correctly, This fixes `114 <https://github.com/taichino/croniter/issues/114>`_.
[kiorky]

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- Pypi hygiene
[hugovk]

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- fix `107 <https://github.com/taichino/croniter/issues/107>`_: microsecond threshold
[kiorky]