remind 0.3.1

A program/daemon for scheduling reminder notifications after a given duration.
0.3.1
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- Added `at` sub-command for scheduling reminder at a specific time


0.3.0
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- Added `list` sub-command for listing scheduled reminders
- Moved `message` positional argument to be part of `in` sub-command


0.2.1
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- Extended duration specification to support sequence of `h`, `m`, and
  `s`
- Adjusted release build compile options to optimize binary for size


0.2.0
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- Initial release