Revert "Update module path in test workflow"

This reverts commit 2acaf08.

Author: Rajat Goel

.github/workflows/test.yml

@@ -18,4 +18,4 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v2
     - name: Test
-      run: go test ./v6/...
+      run: go test ./...