Add versionPrefix to allow setting the version prefix to compare tags

[JavierSegoviaCordoba]

Related Issue

Fix #139

Motivation and Context

Allow changing the version prefix when comparing tags without having to reimplement the sectionUrlBuilder.

How Has This Been Tested

Added one test

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the README.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[hsz]

Thank you, Javier!