BUG: Semver Pre-release not supported

[alexbeltran]

Does not support pre-release. https://semver.org/#spec-item-9

semantics --major="^(?i)major:.*" --minor="^(?i)minor:.*" --patch="^(?i)(patch|fix):.*" --output-tag

How to Reproduce:

> git tag -l --sort -version:refname
v0.21.2-prod
v0.21.2
v0.21.1

>  semantics --major="^(?i)major:.*" --minor="^(?i)minor:.*" --patch="^(?i)(patch|fix):.*"  --dry-run 
Tag section 2-prod is not a valid format