Create .github/workflows/ci.yaml

Author: parkr

.github/workflows/ci.yaml

@@ -0,0 +1,14 @@
+on: push
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: script/cibuild
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+      - name: build
+        run: script/bootstrap
+      - name: test
+        run: script/cibuild