Vanisher [1.8.x - 1.16.x] | Be invisible!

Hey everyone! So in this update, I fixed some bugs when you try to vanish someone else than you. Also I added a few things such as an item to change your gamemode while you're vanished, saves your old inventory before you've been vanished, also saves your old gamemode before vanished and made the plugin more customizable. So you will need (I think) to remove your current config.yml so it can load the new one. Basically, there's no really so many changes in the config, I mean, I didn't removed anything, just added some new lines.