Remove vendored versioneer

.gitattributes

-pystencils/_version.py export-subst
+src/pystencils/_version.py export-subst

pyproject.toml

@@ -70,8 +70,7 @@ tests = [
 [build-system]
 requires = [
     "setuptools>=61",
-    "versioneer>=0.29",
-    "tomli; python_version < '3.11'",
+    "versioneer[toml]>=0.29",
     # 'Cython'
 ]
 build-backend = "setuptools.build_meta"

src/pystencils/__init__.py

@@ -36,7 +36,5 @@ __all__ = ['Field', 'FieldType', 'fields',
            'fd',
            'stencil']
 
-from ._version import get_versions
-
-__version__ = get_versions()['version']
-del get_versions
+from . import _version
+__version__ = _version.get_versions()['version']