Switch to using GH Actions (#107)

This patch switches us away from Travis towards GH Actions for both unit
tests, and publishing.

.github/workflows/publish.yml

@@ -0,0 +1,31 @@
+name: Publish Python distributions to TestPyPi and PyPi
+
+on:
+  release:
+    types: [ published ]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    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 -r requirements.txt
+      - name: Test Package
+        run: |
+          python setup.py test
+      - name: Build Package
+        run: |
+          python setup.py bdist_wheel
+      - name: Publish Package
+        uses: pypa/gh-action-pypi-publish@v1.4.2
+        with:
+          user: __token__
+          password: ${{ secrets.PYPI_API_TOKEN }}
+          packages_dir: ./dist/

.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: Test Builds
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, macos-latest ]
+        python-version: [ 2.7, 3.8, 3.9 ]
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version}}
+      - name: Install Dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Lint with PyCodeStyle
+        run: |
+          pycodestyle .
+      - name: Run Unit Tests
+        run: |
+          python setup.py test
+      - name: Build a Wheel
+        run: |
+          python setup.py bdist_wheel