VOL-4788 : Lib in in voltha-libs-go for support of prometheus counters in voltha

Change-Id: I1a4a81f775595b89dbc2a5e4411e84034e30e1af
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1c6a0e2..041b4bb 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -302,6 +302,7 @@
 # github.com/stretchr/testify v1.7.0
 ## explicit
 github.com/stretchr/testify/assert
+github.com/stretchr/testify/require
 # github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802
 ## explicit
 github.com/tmc/grpc-websocket-proxy/wsproxy