LevelledMobs

Changes allow random variance to apply to player levelling fix issue with minecraft 1.17 purpur servers added command /lm debug spawn_distance added (back) setting into settings.yml: level-mobs-upon-spawn: true when using a custom command with run-on-spawn: true option, it will now respect the chance setting added more debug info for custom commands fixed %player% placeholder not working with custom death messages updated various comments in settings.yml (thanks @oath | Champion of Ravens ) removed obsolete setting attributes-use-preset-base-values from settings.yml and associated code random variance with player levelling can also provide negative variance make internal CustomDropInstance class constructors public, allowing easier 3rd party integration player levelling debug shows more info regarding random variance when applied fix parsing issue for spawn-distance when specific x and z coordinates when used in custom rules fixed warning message when weighted-random: false is specified various minor code changes