Merge pull request #203 from target/cancel-in-progress

Cancel in progress CI jobs when there's a new commit on the branch

.github/workflows/ci.yaml

@@ -9,6 +9,10 @@ on:
   push:
     branches: ['*']
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}