Include building distribution before upload to pypi

.github/workflows/python-publish.yml

@@ -11,12 +11,23 @@ jobs:
   pypi-publish:
     name: upload release to PyPI
     runs-on: ubuntu-latest
+    environment:
+      name: pypi
+      url: https://pypi.org/p/hsmodels
     # Specifying a GitHub environment is optional, but strongly encouraged
     # environment: release
     permissions:
       # IMPORTANT: this permission is mandatory for trusted publishing
       id-token: write
     steps:
-      # retrieve your distributions here
-      - name: Publish package distributions to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Build Distribution
+      run: |
+        python -m pip install --upgrade build
+        python -m build
+    - name: Publish package distributions to PyPI
+      uses: pypa/gh-action-pypi-publish@release/v1