New NLOPT_LUKSAN cmake option to build without Luksan LGPL code (#568).

Dropped unused LD_LBFGS_NOCEDAL enum value.

Python 3.13 support (#565).

Fixed COBYLA not returning the optimum (#57)

Fixed SLSQP returning infeasible optimum (#368)

Fixed STOGO not registering new optimum (#504)

Various minor bugfixes (#570, #563, #379, #511)