use backoff for lookup too

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

go.mod

@@ -2,4 +2,11 @@ module go.unistack.org/micro-client-http/v3
 
 go 1.16
 
-require go.unistack.org/micro/v3 v3.9.7
+require (
+	github.com/google/gnostic v0.6.9 // indirect
+	github.com/google/go-cmp v0.5.7 // indirect
+	github.com/kr/pretty v0.2.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	go.unistack.org/micro/v3 v3.9.7
+	google.golang.org/protobuf v1.28.0 // indirect
+)