Create release with automated notes

Fixes #384

.github/workflows/release.yml

@@ -7,6 +7,9 @@ on:
         description: "Version number"
         required: true
 
+env:
+  VERSION: ${{ github.event.inputs.version_number }}
+
 jobs:
   run_tests:
     name: Run tests
@@ -36,8 +39,6 @@ jobs:
           git_tag_gpgsign: true
           git_push_gpgsign: false
       - name: Tag release
-        env:
-          VERSION: ${{ github.event.inputs.version_number }}
         run: |
           DATE=`date "+%Y-%m-%d"`
           COMMIT_MESSAGE="[ci skip] Set release date"
@@ -48,3 +49,8 @@ jobs:
           git commit -m "$COMMIT_MESSAGE"
           git tag "v$VERSION" -m "$TAG_MESSAGE"
           git push && git push --tags
+      - name: Publish release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: "v${{ env.VERSION }}"
+          generate_release_notes: true