Used new 'core'.

Signed-off-by: Roland Haeder <roland@mxchange.org>

diff --git a/core b/core
index 5d02554156f746355bf6863924b38b784569be24..bef559891cd85858fd3b5060354fb5b3bda2f604 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 5d02554156f746355bf6863924b38b784569be24
+Subproject commit bef559891cd85858fd3b5060354fb5b3bda2f604