Test concurrency groups in the test pipeline (#132)

Author: Ickerday

.github/workflows/test.yml

@@ -1,6 +1,10 @@
 name: Python SDK CI
 on: [push, workflow_dispatch]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test-stage:
     runs-on: ${{ matrix.os }}