ci: add github actions to publish every PR on test pypi

Author: sansyrox

.github/workflows/build-CI.yml

@@ -187,3 +187,23 @@ jobs:
           TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
         run: |
           pip install --upgrade twine
+          twine upload --skip-existing *
+
+  preview_release:
+    name: Preview Release
+    runs-on: ubuntu-latest
+    needs: [macos, windows, linux, linux-cross]
+    steps:
+      - uses: actions/download-artifact@v3
+        with:
+          name: wheels
+      - uses: actions/setup-python@v4
+        with:
+          python-version: 3.x
+      - name: Publish to PyPi
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.TEST_PYPI_PASSWORD }}
+        run: |
+          pip install --upgrade twine
+          twine upload -r testpypi --skip-existing *