Bump mods/signs_lib from `14efa6e` to `e66863d`

Bumps [mods/signs_lib](https://github.com/mt-mods/signs_lib) from `14efa6e` to `e66863d`.
- [Release notes](https://github.com/mt-mods/signs_lib/releases)
- [Commits](https://github.com/mt-mods/signs_lib/compare/14efa6eeb7b46c61f35dc55ebd3aa1b25f818671...e66863d1156e3e18be915ee4cbf6fc8659b0027b)

signs_lib @ e66863d1

-Subproject commit 14efa6eeb7b46c61f35dc55ebd3aa1b25f818671
+Subproject commit e66863d1156e3e18be915ee4cbf6fc8659b0027b