Add a validation workflow for Github Actions

Author: dmtucker

.github/workflows/validation.yml

@@ -0,0 +1,15 @@
+name: Validation
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - run: python -m pip install --upgrade tox-gh-actions
+    - run: python -m tox

tox.ini

@@ -9,6 +9,13 @@ envlist =
     py38-pytest{3.5, 3.x, 4.0, 4.x, 5.0, 5.x}-mypy{0.71, 0.7x}
     static
 
+[gh-actions]
+python =
+    3.5: py35-pytest{3.5, 3.x, 4.0, 4.x, 5.0, 5.x}-mypy{0.50, 0.5x, 0.60, 0.6x, 0.70, 0.7x}
+    3.6: py36-pytest{3.5, 3.x, 4.0, 4.x, 5.0, 5.x}-mypy{0.50, 0.5x, 0.60, 0.6x, 0.70, 0.7x}
+    3.7: py37-pytest{3.5, 3.x, 4.0, 4.x, 5.0, 5.x}-mypy{0.50, 0.5x, 0.60, 0.6x, 0.70, 0.7x}
+    3.8: py38-pytest{3.5, 3.x, 4.0, 4.x, 5.0, 5.x}-mypy{0.71, 0.7x}, static
+
 [testenv]
 deps =
     pytest3.5: pytest ~= 3.5.0