Updated golangci-lint action

Author: vgarvardt

.github/workflows/testing.yml

@@ -14,9 +14,7 @@ jobs:
       - name: Check out code
         uses: actions/checkout@v2
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v1
-        with:
-          version: v1.27
+        uses: golangci/golangci-lint-action@v2
 
   test:
     name: Test