Add Github action for auto publish to pypi (#62)

* Closes #45 
* Adds Github Action to build wheels and publish to PyPI

.github/workflows/release.yml

@@ -0,0 +1,51 @@
+name: Build wheels
+
+on:
+  release:
+    types: [created, edited]
+  pull_request:
+    types: [opened, reopened, edited, synchronize]
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  # This workflow contains a single job called "build"
+  build:
+    # The type of runner that the job will run on
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.8]
+
+    # Steps represent a sequence of tasks that will be executed as part of the job
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - uses: actions/checkout@v2
+
+      # Set up Python environment
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+
+      # Install dependencies
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r development.txt
+
+      # Build wheels
+      - name: Build wheels
+        run: python setup.py sdist bdist_wheel
+
+      - uses: actions/upload-artifact@v2
+        with:
+          path: |
+           ./dist/*.tar.gz
+
+      # Publish to pypi
+      - name: Publish to pypi
+        env:
+          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
+          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
+        if: ${{ github.event_name == 'release' && env.TWINE_USERNAME != null }}
+        run: twine upload --repository pypi dist/*