Add support for "patch" patterns

[serpro69]

Hi, Thanks for this action :) Would it be possible to add support for "patch" patterns, similar to "major" and "minor"?

From what I understood, patches are used when major or minor keyword is not present. However, what if we don't want to tag each commit and at the same time want to release versions (i.e. trigger the workflow with this action) only from pushes? How would one be able to release "patch" versions in such case?