Add new lua_async commits

diff --git a/src b/src
index 457e91a5eeba4a211fc0abdaf0e8fb200ec0dfb9..e6b45a401139b6ed41bf6d5612d1c80d5424b97f 160000 (submodule)
--- a/src
+++ b/src
@@ -1 +1 @@
-Subproject commit 457e91a5eeba4a211fc0abdaf0e8fb200ec0dfb9
+Subproject commit e6b45a401139b6ed41bf6d5612d1c80d5424b97f