Adopt PEP 517 tooling for builds

.github/workflows/release.yml

@@ -18,17 +18,17 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.8
+          python-version: 3.9
 
       - name: Install dependencies
         run: |
           python -m pip install -U pip
-          python -m pip install -U setuptools twine wheel
+          python -m pip install -U setuptools twine wheel build
 
       - name: Build package
         run: |
-          python setup.py --version
-          python setup.py sdist --format=gztar bdist_wheel
+          python -m setuptools_scm
+          python -m build --sdist --wheel --no-isolation
           twine check dist/*
 
       - name: Upload packages to Jazzband

pyproject.toml

@@ -1,3 +1,6 @@
+[build-system]
+requires = ["setuptools>=45", "wheel", "setuptools_scm>=6.2"]
+
 [tool.coverage.report]
 exclude_lines = [
     "if TYPE_CHECKING:",
@@ -51,3 +54,7 @@ required-imports = ["from __future__ import annotations"]
 # This likely needs to be addressed in Django itself (either use an immutable
 # type or annotate these fields as ClassVar)
 "testapp/testapp/testmain/migrations/0*.py"= ["RUF012"]
+
+[tool.setuptools_scm]
+write_to = "payments/version.py"
+version_scheme = "post-release"