First try at GitHub Actions

.github/workflows/tests.yml

@@ -0,0 +1,22 @@
+name: run-tox
+on: [push]
+jobs:
+  unit-tests:
+    runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8]
+
+    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 requirements
+        run: |
+        sed -i -e 's/^/#/' tests/gnupghome/gpg-agent.conf
+        ./install_dependencies.linux.sh
+        pip install tox python-coveralls
+      - name: Run Tox
+        run: tox -e py