VOL-1971 - make v2 the default API version

Change-Id: Ib0b29187d40cd77f78fc162151f8c49f7af9ca55
diff --git a/Gopkg.toml b/Gopkg.toml
index 842120f..eea2f44 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -60,3 +60,7 @@
 [[constraint]]
   name = "k8s.io/client-go"
   version = "11.0.0"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.4.0"