Update 1.9.25-b(Hotfix)

Fixed issue when generating new files that caused null pointer Fixed issue loading skills. Skills are now built on Java 16 just like Heroes allowing backwards compat for 1.16.5 and above Updated default classes to some nice community submitted ones. These are much more helpful when using Heroes for the first time. Fixed a long-standing issue with the custom knockback implementation, where values less than vanilla knockback would tend to sometimes pull an entity towards the player.