Cmocean

**Full Changelog**: https://github.com/matplotlib/cmocean/compare/v4.0.2...v4.0.3

**Full Changelog**: https://github.com/matplotlib/cmocean/compare/v4.0.1...v4.0.2

Fix for https://github.com/matplotlib/cmocean/issues/107

I mess up the initial release every time because I can't remember to update the version manually. This is the only package I manage where I have to do that.

What's Changed
* Bump codecov/codecov-action from 3 to 4 by dependabot in https://github.com/matplotlib/cmocean/pull/104
* Bump actions/setup-python from 4 to 5 by dependabot in https://github.com/matplotlib/cmocean/pull/103
* Adds functionality for inverting colormap lightness by andrew-s28 in https://github.com/matplotlib/cmocean/pull/106

New Contributors
* andrew-s28 made their first contribution in https://github.com/matplotlib/cmocean/pull/106

**Full Changelog**: https://github.com/matplotlib/cmocean/compare/v3.1.3...v4.0.0

Manually updated the version to match, in setup.py.

This has the whole actual fix for release.yaml, unlike the previous release which was missing part of a line.