Add GitHub Actions

.github/workflows/tests.yml

@@ -0,0 +1,26 @@
+name: Make Tests
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 4
+      matrix:
+        python-version: [2.7, 3.7]
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          - sudo apt-get update -qq
+          - sudo apt-get install -y -qq postfix
+          - pip install -U -q pip
+          - pip install -r requirements.txt
+      - name: Make tests
+        run: make tests