1.2.3
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- Drop support for Python 3.3, 3.4, and 3.5
- Move CI from Travis to Github Actions
- Improve packaging

1.2.2
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- Fix a bug when using records with arguments

1.2.1
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- Raise an exception if you pass structured data without setting SD-ID

1.2.0
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- Support overriding procid/msgid and setting structured data (#11; thanks @tkoopman)
- Add some new tests

1.1.1
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- Add some more meta-information to setup.py
- Set up ReadTheDocs

1.1.0
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- Drop support for Python 3.3
- Add support for Python 3.7

1.0.1
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Clean up some stuff in `setup.py`; no user-visible changes
