Meanstars

Adding a single-source version string in the package init.

What's Changed
* Change to importlib from pkg_resources by CoreySpohn in https://github.com/dsavransky/MeanStars/pull/4

New Contributors
* CoreySpohn made their first contribution in https://github.com/dsavransky/MeanStars/pull/4

**Full Changelog**: https://github.com/dsavransky/MeanStars/compare/v3.5.0...v3.5.1

Minor update to fix deprecation of numpy's floating point definitions and updating minimum python requirement to 3.10. Supported Python versions are now 3.10 - 3.12.

What's Changed
* Update MeanStars.py to float64 by douglase in https://github.com/dsavransky/MeanStars/pull/2

New Contributors
* douglase made their first contribution in https://github.com/dsavransky/MeanStars/pull/2

**Full Changelog**: https://github.com/dsavransky/MeanStars/compare/v3.4.0...v3.5.0

This release completely reworks the spectral string parsing functionality in MeanStars, replacing the three separate regular expressions previously used with a single, unified expression that supports a much broader range of valid spectral type strings. In particular, composite classes now have much better support, single decimal points (.) are never treated as valid numbers, and support is added for the rare quarter type (+/- following a subclass).

**Full Changelog**: https://github.com/dsavransky/MeanStars/compare/v3.3.1...v3.4.0

Bugfix release. In v3.3.0, subdwarfs were being assigned a luminosity class of VII. This has been corrected to VI.