Merge pull request 'fix deps' (#6) from dev into master

Reviewed-on: https://chacha.ddns.net/gitea/chacha/pygitversionhelper/pulls/6

Jenkinsfile

@@ -175,8 +175,7 @@ pipeline {
                                          |__EOWRAPPER__
                                       """.stripMargin())
                                       
-                        // using setuptools_git_versioning to get the generated version number based on Git tags and logs
-                        // TODO: read dev_template from toml
+                        // get current (or bumped) version number from git history
                         PY_PROJECT_VERSION = sh(script:   """#!/bin/sh -
                                                              |. ~/TOOLS_ENV/bin/activate
                                                              |exec python - << '__EOWRAPPER__'

pyproject.toml

@@ -36,6 +36,7 @@ classifiers = [
 ]
 dependencies = [
     'importlib-metadata; python_version<"3.9"',
+    'packaging'
 ]
 dynamic = ["version"]