Ignore pre-release versions

[mongolyy]

I use action-bumpr and have an idea to improve the behavior of bump.

Currently, when I run the following commands:

$ git tag
v0.1.0
v0.2.0
v0.3.0-beta

$ bump minor
v0.4.0

The bump generates v0.4.0 as the next version.
However, in my use case, I would prefer the tool to ignore versions that contain specific keywords (e.g., -alpha, -beta, -RC) and instead return the next version based on the latest stable release.
In this case, it should return v0.3.0.

I suggest adding an option to ignore versions that contain specific keywords (e.g., -alpha, -beta, -RC).