Test GH Action workflow

.github/workflows/ci.yml

@@ -0,0 +1,17 @@
+name: CI
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+
+      - name: Set up Python 3.7
+        uses: actions/setup-python@v1
+        with:
+          python-version: 3.7