Changes:
+ /ie potioneffect add <effect> <duration> [level] turns to /ie potioneffect add <effect> <duration> [level] [particles] [ambient] [icon], particles allow to set if particles should be shown (true/false), ambient sets if the particles should have ambient effect (true/false), icon sets if the icon of the potion effect should be shown on top right corner (true/false) only works on 1.13+
+ /ie potioneffect add allows infinite duration when setting the value as -1