Bump to v0.1.1 and add TestPyPI staging step

Publishes to TestPyPI first, then PyPI, both on v* tag push.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Transurgeon

.github/workflows/build-and-publish.yml

@@ -47,9 +47,28 @@ jobs:
           name: cibw-sdist
           path: ./dist/*.tar.gz
 
-  upload_pypi:
+  upload_testpypi:
     needs: [build_wheels, build_sdist]
     runs-on: ubuntu-latest
+    environment: testpypi
+    permissions:
+      id-token: write
+    if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          pattern: cibw-*
+          path: dist
+          merge-multiple: true
+
+      - name: Publish to TestPyPI
+        uses: pypa/gh-action-pypi-publish@release/v1
+        with:
+          repository-url: https://test.pypi.org/legacy/
+
+  upload_pypi:
+    needs: [upload_testpypi]
+    runs-on: ubuntu-latest
     environment: pypi
     permissions:
       id-token: write

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sparsediffpy"
-version = "0.1.0"
+version = "0.1.1"
 description = "Python bindings for SparseDiffEngine automatic differentiation"
 requires-python = ">=3.11"
 dependencies = ["numpy >= 2.0.0"]