Changes
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- Windows support! (17 1)
- Make `catch_signals` [reusable and reentrant](https://docs.python.org/3/library/contextlib.htmlsingle-use-reusable-and-reentrant-context-managers) (14 18)
- Ensure ReadTheDocs is working (9ac87e9)
This isn't a prerelease because I've used it a bunch, but it's also definitely not a 1.0. Some APIs are subject to change.