0.2.1
-----
- Initialize `tracing` infrastructure
  - Added `-v`/`--verbose` flag to control verbosity


0.2.0
-----
- Added support for PGP encrypting emails
- Switched to honoring system-wide instead of per-use configuration by
  default
- Made content type to use configurable via `--content-type` argument


0.1.0
-----
- Initial release