add: a GitHub actions workflow for the testPyPI upload

.github/workflows/publish.yml

@@ -0,0 +1,52 @@
+name: Build wheels and sdist and upload everything to testPyPI
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build_wheels:
+    name: Build wheels on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04, windows-2019]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build wheels
+        uses: pypa/[email protected]
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./wheelhouse/*.whl
+
+  build_sdist:
+    name: Build source distribution
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build sdist
+        run: pipx run build --sdist
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: dist/*.tar.gz
+
+  upload_pypi:
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifact
+          path: dist
+
+      - uses: pypa/[email protected]
+        with:
+          user: __token__
+          password: ${{ secrets.TEST_PYPI_PYSNDBXBNJMNP_ACCESS_TOKEN }}
+          repository_url: https://test.pypi.org/legacy/

pyproject.toml

@@ -20,4 +20,8 @@ dynamic = ["version"]
 where = ["src"]
 
 [tool.setuptools.dynamic]
-version = {attr = "pysndbxbnjmnp.__version__"}
+version = {attr = "pysndbxbnjmnp.__version__"}
+
+# Limit the created wheels for windows to AMD64.
+[tool.cibuildwheel.windows]
+archs = ["AMD64"]