Add testing with Github Actions

Just the delivery local mode bit for now.
Signed-off-by: Tim Smith <tsmith@chef.io>

.github/workflows/delivery.yml

+name: delivery
+
+on: [push, pull_request]
+
+jobs:
+  delivery:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Check out code
+      uses: actions/checkout@master
+    - name: Run Chef Delivery
+      uses: actionshub/chef-delivery@master
+      env:
+        CHEF_LICENSE: accept-no-persist
\ No newline at end of file