Add github release step

Author: sweeneytr

.github/workflows/build-n-publish.yaml

@@ -3,7 +3,8 @@ name: "Publish Python distributions to PyPI and TestPyPI"
 
 on:
   push:
-    tags: ["*"]
+    tags:
+      - "v*"
 
 jobs:
   build-n-publish:
@@ -22,7 +23,12 @@ jobs:
 
       - name: Build a binary wheel and a source tarball
         run: python -m build --sdist --wheel --outdir dist/
-        
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: dist/*
+      
       - name: "Publish distribution to PyPI"
         if: 'startsWith(github.ref, ''refs/tags'')'
         uses: pypa/gh-action-pypi-publish@release/v1