Update GitHub workflow

Author: lcnittl

.github/workflows/publish.yaml

@@ -9,8 +9,8 @@ on:
   push
 
 jobs:
-  build-n-publish:
-    name: Build and publish to PyPI
+  build:
+    name: Build package
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
@@ -26,12 +26,30 @@ jobs:
       - name: Build package
         run: |
           python -m build
+      - name: Upload dist files
+        uses: actions/upload-artifact@v2
+        with:
+          name: dist-files
+          path: dist/
+          if-no-files-found: error
+  publish:
+    name: Publish to PyPI
+    runs-on: ubuntu-latest
+    needs: build-n-publish
+    steps:
+      - name: Download dist files
+        uses: actions/download-artifact@v2
+        with:
+          name: dist-files
+          path: dist/
       - name: Publish package to Test PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
+          user: __token__
           password: ${{ secrets.TEST_PYPI_API_TOKEN }}
       - name: Publish package to PyPI
         if: startsWith(github.ref, 'refs/tags')
         uses: pypa/gh-action-pypi-publish@release/v1
         with:
+          user: __token__
           password: ${{ secrets.PYPI_API_TOKEN }}