Add release action

Author: andrusha

.github/workflows/build.yml

@@ -1,8 +1,8 @@
 name: CD
 on:
   push:
-    branches:
-      - main
+    branches: [ 'main' ]
+    tags: [ '*' ]
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -237,3 +237,23 @@ jobs:
         with:
           name: wheels
           path: target/wheels
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    if: "startsWith(github.ref, 'refs/tags/')"
+    needs: [ macos, windows, linux, linux-cross, musllinux ]
+    steps:
+      - uses: actions/download-artifact@v2
+        with:
+          name: wheels
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.10
+      - name: Publish to PyPi
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        run: |
+          pip install --upgrade twine
+          twine upload --skip-existing *