[VOL-3930] Upgrading to latest voltha-lib-go

Change-Id: Ie7213bdbabf40cc70b32c8135a3383de612135a1
diff --git a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/eventif/events_proxy_if.go b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/eventif/events_proxy_if.go
index 7418ea1..35f821f 100644
--- a/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/eventif/events_proxy_if.go
+++ b/vendor/github.com/opencord/voltha-lib-go/v4/pkg/events/eventif/events_proxy_if.go
@@ -29,6 +29,8 @@
 		subCategory EventSubCategory, raisedTs int64) error
 	SendRPCEvent(ctx context.Context, id string, deviceEvent *voltha.RPCEvent, category EventCategory,
 		subCategory *EventSubCategory, raisedTs int64) error
+	EnableLivenessChannel(ctx context.Context, enable bool) chan bool
+	SendLiveness(ctx context.Context) error
 }
 
 const (