Add publish workflow (#28)

Author: davidbrochart

.github/workflows/publish.yml

@@ -0,0 +1,39 @@
+name: publish
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  build:
+    name: Build the source tarball and the wheel
+    runs-on: ubuntu-latest
+    environment: release
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.x
+    - name: Install dependencies
+      run: pip install hatch
+    - name: Create packages
+      run: hatch build
+    - name: Archive packages
+      uses: actions/upload-artifact@v4
+      with:
+        name: dist
+        path: dist
+
+  publish:
+    name: Publish build artifacts to PyPI
+    needs: build
+    runs-on: ubuntu-latest
+    environment: release
+    permissions:
+      id-token: write
+    steps:
+    - name: Retrieve packages
+      uses: actions/download-artifact@v4
+    - name: Upload packages
+      uses: pypa/gh-action-pypi-publish@release/v1

.github/workflows/main.yml renamed to .github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: CI
+name: test
 
 on:
   push:

README.md

@@ -1,4 +1,4 @@
-[![Build Status](https://github.com/davidbrochart/ypywidgets/workflows/CI/badge.svg)](https://github.com/davidbrochart/ypywidgets/actions)
+[![Build Status](https://github.com/davidbrochart/ypywidgets/workflows/test/badge.svg)](https://github.com/davidbrochart/ypywidgets/actions)
 
 # ypywidgets: Y-based Jupyter widgets for Python