Show only provided versions/sections

Hi there and thanks for a great Vue component/changelog generator : )

We'd love to use this to show the changed/newest versions of the changelog to a user.
Would it be possible to provide a semver from which upwards to show versions?
So if we'd provide `1.4.2`, it'd show from there upwards (and maybe also exclude `[Unreleased]`)

Start at the Vue component/changelog generator entry point and trace how versions and sections are selected for display. Define the provided semver as the lower bound, verify that versions from it upward render, and check whether [Unreleased] can be excluded; done means the requested filtering behavior is demonstrated.

Written by the indexing model from the issue text.