tests: Pass -race to go test to detect data races

Author: rhansen

.github/workflows/tests.yml

@@ -38,4 +38,4 @@ jobs:
         run: make check-gofmt
 
       - name: Run tests
-        run: go test -v ./internal/...
+        run: go test -race -v ./internal/...

Makefile

@@ -56,4 +56,4 @@ check-gofmt:
 	fi
 
 test:
-	go test ./internal/...
+	go test -race ./internal/...