feat!: require 1.20 at last

Author: timbru31

src/main/resources/plugin.yml

@@ -4,7 +4,7 @@ main: de.dustplanet.silkspawnersshopaddon.SilkSpawnersShopAddon
 version: ${project.version}${build.number}
 website: https://www.spigotmc.org/resources/12028/
 description: A sign shop for SilkSpawners
-api-version: 1.13
+api-version: 1.20
 commands:
   silkspawnersshopaddon:
     description: Used to edit shops, administrative command