Continued:

- updated 'core' to latest commit

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

diff --git a/core b/core
index 93b7ac0613b9702427ec8314a6ef45dbfc3ea224..f57dd51863ec9baacba447d76b46d5c709b9b02e 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 93b7ac0613b9702427ec8314a6ef45dbfc3ea224
+Subproject commit f57dd51863ec9baacba447d76b46d5c709b9b02e