pyproject: Generate version dynamically

pyproject.toml

 [project]
 name = "schilder2000"
-version = "0.1.0"
+dynamic = ["version"]
 description = "Schildergenerator 2000"
 authors = [
     {name = "Thomas Schneider", email = "thomas@fsmpi.rwth-aachen.de"},
@@ -53,6 +53,9 @@ includes = [
     # Referenced files in manifest.json included via pdm_build.py
 ]
 
+[tool.pdm.version]
+source = "scm"
+
 [build-system]
 requires = ["pdm-backend", "pynpm"]
 build-backend = "pdm.backend"