Added a small test ☺ (#108)

tests/infrastructure_test.py

@@ -6,3 +6,6 @@ def test_version() -> None:
     """Tests if the version tag is entered."""
     assert aki_prj23_transparenzregister.__version__
     assert isinstance(aki_prj23_transparenzregister.__version__, str)
+    assert aki_prj23_transparenzregister.__author__
+    assert isinstance(aki_prj23_transparenzregister.__author__, str)
+    assert aki_prj23_transparenzregister.__email__ is None