VOL-2098 Release voltha-lib-go 2.2.11

Change-Id: I3c4793b4bc8f48d1e37d974162f0f471d7d47bb2
diff --git a/VERSION b/VERSION
index 87e6816..0b6e431 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.11-dev
+2.2.11