adding back in deploy workflow

.github/workflows/test_and_deploy.yml

@@ -65,3 +65,29 @@ jobs:
 
       - name: Coverage
         uses: codecov/codecov-action@v1
+
+  deploy:
+    # this will run when you have tagged a commit, starting with "v*"
+    # and requires that you have put your twine API key in your 
+    # github secrets (see readme for details)
+    needs: [test]
+    runs-on: ubuntu-latest
+    if: contains(github.ref, 'tags')
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: "3.x"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -U setuptools setuptools_scm wheel twine
+      - name: Build and publish
+        env:
+          TWINE_USERNAME: __token__
+          TWINE_PASSWORD: ${{ secrets.TWINE_API_KEY }}
+        run: |
+          git tag
+          python setup.py sdist bdist_wheel
+          twine upload dist/*