librarian update

diff --git a/lib/librarian b/lib/librarian
index fc7a836..90f6c5d 160000 (submodule)
--- a/lib/librarian
+++ b/lib/librarian
@@ -1 +1 @@
-Subproject commit fc7a8368b6033616780d563149d78db33b6b91a3
+Subproject commit 90f6c5d936cafdc51639b251591a909696ea4935