Csv-ical

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- Switched to PEP-526 type hints (this removes support for python versions less than 3.5)
- Add `DTSTAMP` and `uid` fields into output iCal

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- Support parsing events with no `DSTART` or `DTEND` properties
- Update dependencies

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- Remove python 2 support
- Simplify code

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- Fix issue with utf-8 encoding and newlines
- Fix support for python 2
- Update dependencies

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- Update dependencies
- Don't allow library to modify global config (AlbertoMarnetto)

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- Fix getting calendar end time
- Make converting ical to csv conversion fail gracefully on nonexistent fields
- Dependency updates