fix: use python -m build in make publish, drop setup.py

PyPI now rejects sdist filenames from the legacy `setup.py sdist`
path (hyphenated) since it enforces PEP 625 normalized names
(underscore). Switch to `python -m build`, which also produces a
wheel. setup.py was just a `setup()` shim; replaced with a minimal
pyproject.toml declaring the setuptools build backend.

Author: skyrpex

Makefile

@@ -14,7 +14,10 @@ install:           ## Install dependencies in local virtualenv folder
 
 publish:           ## Publish the library to the central PyPi repository
 	# build and upload archive
-	$(VENV_RUN); ./setup.py sdist && twine upload $(BUILD_DIR)/*.tar.gz
+	rm -rf $(BUILD_DIR)
+	$(VENV_RUN); $(PIP_CMD) install --upgrade build twine && \
+		python -m build --sdist --wheel && \
+		twine upload $(BUILD_DIR)/*
 
 test:              ## Run automated tests
 	($(VENV_RUN); test `which localstack` || pip install .[test]) && \

pyproject.toml

@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"