Git commit ID is not getting appended to the computed version

## Issue

**version**: 1.4.3

**usage context**:

- [x] maven command line: 3.5.2

**Problem description**:

I want to append the Git commit ID with the computed version, to enable this, have added `useGitCommitId` element in the _jgitver.config.xml_ file.

In the POM file, the version is **4.0.0-SNAPSHOT**, created a lightweight tag(v4.0.0) , `mvn validate` is returning the computed version with commit ID. eg:v4.0.0-abcdefgh

Now I want to release a minor version, created a lightweight tag(v4.1.0). The computed version is just returning **v4.1.0**, my expectation was that it would return a version with commit ID eg:v4.1.0-xyzabcpq.

Am I doing something wrong? Is it a bug or expected behavior, I don't see much documentation about appending the commit ID.