Script the release in the GitHub action

This removes the use of our custom PyPI action for simplicity

.github/workflows/release.yml

@@ -1,14 +1,24 @@
-on: release
-name: Publish
+name: Publish to PyPI
+on: [release]
+
 jobs:
-  publishToPyPI:
-    name: Publish to PyPI
+  build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@master
-    - name: Publish to PyPI
-      uses: cfpb/pypi-publish-action@master
-      env:
-        LIVE_PYPI: "True"
-        TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
+    - uses: actions/checkout@v1
+    - name: Set up Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.7
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install twine wheel
+    - name: Build the package
+      run: |
+        python setup.py sdist bdist_wheel --universal
+    - name: Upload to PyPI
+      run: twine upload dist/*
+      env: 
         TWINE_USERNAME: ${{ secrets.TWINE_USERNAME }}
+        TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}