VOL-2189 update voltha-simolt-adapter to use voltha-protos=v2.0.1 and voltha-lib-go=v2.2.9;
Release 2.2.1

Change-Id: I71b969bdd89f588b2abc6473c875542ca7319b11
diff --git a/go.mod b/go.mod
index 133a99a..62f8c74 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@
 
 require (
 	github.com/gogo/protobuf v1.3.0
-	github.com/opencord/voltha-lib-go/v2 v2.2.7
-	github.com/opencord/voltha-protos v1.0.3
+	github.com/opencord/voltha-lib-go/v2 v2.2.9
+	github.com/opencord/voltha-protos/v2 v2.0.1
 	github.com/stretchr/testify v1.4.0
 )