Use git for dependency check in CircleCI

Resolves #1584 (comment)

Author: Ivan Mirić

.circleci/config.yml

@@ -10,7 +10,7 @@ jobs:
           name: Check dependencies
           command: |
             go version
-            diff <(go mod vendor -v 2>&1 | grep -v 'go: downloading') vendor/modules.txt
+            test -z "$(go mod vendor && git status --porcelain)"
             go mod verify
 
   lint: