Maven plugin generates semver-incompatible versions

[fjakop]

We're using jgitver-maven-plugin version 1.9.0 and no specific configuration.

When we generate a version on a branch named story/IT-4434/IT-4551-frontend and the nearest lightweight tag being v35.0.0 the generated version is 35.0.0-story_it_4434_it_4551_frontend-SNAPSHOT.

According to https://semver.org/#spec-item-9 the underscore is not an allowed character in the prerelease identifier.

This behaviour causes a following maven goal (org.revapi:revapi-maven-plugin:0.15.1:check) to fail since a checking against the semver spec is done.