Update lib submodule

diff --git a/rpp-lib b/rpp-lib
index e4e591de881211ff8325716e902540e77623d2fd..9e11b4e39d50fdd516f59dcb9b18f5835a66be4f 160000 (submodule)
--- a/rpp-lib
+++ b/rpp-lib
@@ -1 +1 @@
-Subproject commit e4e591de881211ff8325716e902540e77623d2fd
+Subproject commit 9e11b4e39d50fdd516f59dcb9b18f5835a66be4f