[VOL-4485] omci-lib-go: ME Attribute names should be exported

Change-Id: I15ef78c3b470a9c49a23b32aad513c1cddfb3066
diff --git a/go.mod b/go.mod
index 8abcf13..a6368cd 100644
--- a/go.mod
+++ b/go.mod
@@ -15,7 +15,7 @@
 	github.com/golang/protobuf v1.5.2
 	github.com/google/gopacket v1.1.17
 	github.com/looplab/fsm v0.2.0
-	github.com/opencord/omci-lib-go/v2 v2.1.3
+	github.com/opencord/omci-lib-go/v2 v2.2.0
 	github.com/opencord/voltha-lib-go/v7 v7.1.3
 	github.com/opencord/voltha-protos/v5 v5.1.2
 	github.com/stretchr/testify v1.7.0