Update the library to version 6.12.4

diff --git a/lib b/lib
index aec9e4131b092ed33213b9891e1dc2b9574edf99..5bfb408b991028b28b411c28971831f59ece4684 160000 (submodule)
--- a/lib
+++ b/lib
@@ -1 +1 @@
-Subproject commit aec9e4131b092ed33213b9891e1dc2b9574edf99
+Subproject commit 5bfb408b991028b28b411c28971831f59ece4684