Fix CI concurrency and fail-fast for test

Author: ikrivosheev

.github/workflows/ci.yml

@@ -7,12 +7,17 @@ env:
   CARGO_INCREMENTAL: 0
   CARGO_NET_RETRY: 10
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.ref || github.run_id }}
+  cancel-in-progress: true
+
 jobs:
   test:
     name: Test
     runs-on: ubuntu-latest
 
     strategy:
+      fail-fast: false
       matrix:
         rust:
           - stable