Add github actions tests

.github/workflows/github-tox.yml

@@ -0,0 +1,13 @@
+name: Tests
+on: [push,pull_request]
+jobs:
+  check-with-tox:
+    name: Check with tox
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: fedora-python/tox-github-action@master
+        with:
+          # The tox environment to run
+          # Default: py38 (subject to change as new Python releases come out)
+          tox_env: py38