I KNOW WHAT YOU WILL SAY, the link is not to spigot or bukkit website.
BUT please, just for one time! accept this plugin 
EssentialsX is updated to 1.13, but in development build, and the update is not on spigot or bukket website, and they will not release it soon!
SO...
[Plugin Requrest] EssentialsX for 1.13
Hi Aternos Team, can you please add the following plugin?
Plugin name: EssentialsX
Plugin link: https://ci.ender.zone/job/EssentialsX-Experimental/
Description:
An updated fork of Essentials with spawner support, performance enhancements, and more
Thank you!
I TRIED TOO MANY TIMES TO TELL THEM TO UPLOAD THE PLUGIN ON SPIGOT, BUT...
[Blocked Image: https://i.paste.pics/c7319256260e3ce8507bcd92e09347db.png]