And yet again 'core' is updated, always use own getter/setter for easier refactoring.

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

diff --git a/core b/core
index c8fb3b209b8a11cdcbff77fb790739490816ad0e..867042ee4793d38bd778717192f4f6cd727b8e19 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit c8fb3b209b8a11cdcbff77fb790739490816ad0e
+Subproject commit 867042ee4793d38bd778717192f4f6cd727b8e19