A new PreRelease Sensitity Level for semver

[jouve]

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What would you like to be added:

Add a new Pre Release Sensitivity level for semver.

The behavior of "Patch" would change to upgrade only to non pre-release versions
and the new PreRelease sensitity would behave like Patch currently does.

Why is this needed:

When upgrading with the patch sensitivity, I don't expect to fetch pre-releases.

other tools have such flags:
helm

      --devel                                      use development versions, too. Equivalent to version '>0.0.0-0'. If --version is set, this is ignored

or poetry has

--allow-prereleases: Accept prereleases.