build: add univalue/lib to sdist

By default, `python -m build --sdist` excludes the `univalue/lib`
directory, which causes installations from source to fail.

Also add a "Test SDist" step to ensure the sdist works.

Author: stickies-v

.github/workflows/release.yml

@@ -222,5 +222,10 @@ jobs:
           python -m pip install build
           python -m build --sdist
 
+      - name: Test SDist
+        run: |
+          python -m pip install dist/*.tar.gz
+          pytest
+
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1

pyproject.toml

@@ -25,6 +25,9 @@ test-extras = ["test"]
 [tool.scikit-build]
 wheel.packages = ["src/pbk"]
 wheel.install-dir = "pbk"
+sdist.include = [
+    "depend/bitcoin/src/univalue/lib/**",  # Otherwise this doesn't get included in the sdist
+]
 
 [project.optional-dependencies]
 test = [