MAINT: update release protocol --> versioning scheme

[sappelhoff]

For future releases, we should follow https://semver.org/ more closely and always add the patch version as well. That is, 0.14 would be 0.14.0.

See discussion here:

• MAINT: Updates to dependencies mne-installers#227 (comment)

[hoechenberger]

With #1204, we'll only need to tag the version in the VCS for a release. Just saying that this needs to be reflected in the release protocol as well – no more manual version bumping

[sappelhoff]

We should also add an "automated workflow to publish to pypi" upon making a GH release based on a tag.

[hoechenberger]

We should also add an "automated workflow to publish to pypi" upon making a GH release based on a tag.

Maybe it's a good time to tackle this now as we'll need to release 0.15 sometime soon anyway

[sappelhoff]

I added GitHub as a "trusted publisher" on PyPI:

following:

• https://docs.pypi.org/trusted-publishers/adding-a-publisher/
• https://github.com/mne-tools/mne-python/blob/main/.github/workflows/release.yml