Nionswift-io

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- Require Numpy 2. Add Python 3.13 support. Drop Python 3.9, 3.10 support.

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- Update requirements.

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- Update requirements, version.
- Add Python 3.11 support; drop Python 3.8 support.

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- Update dependencies for Swift 0.16.3 compatibility.

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- Fix handling of spectrum image export in DM format (now recognized in DM).
- Drop support for Python 3.7.
- Compatible with Swift 0.16

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- Partially fix issue storing tuple-of-tuple as rectangle in dm3 import/export.