Update core

Signed-off-by: Florent Bruneau <florent.bruneau@polytechnique.org>

diff --git a/core b/core
index 9d865d0..55e0360 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 9d865d031dc03395c381b8d829052f9775e69c38
+Subproject commit 55e0360da3728c21aaaa687119b3842d658a27e2