Log Message:
todoman: update to 3.3.0.

v3.3.0
------

* New runtime dependency: ``click-log``.
* Drop support for Python 3.3, which has reached its end of life cycle.
* Add `--raw` flag to `edit`. This allows editing the raw icalendar file, but
  **only use this if you really know what you're doing**. There's a big risk of
  data loss, and this is considered a developer / expert feature!