Add UTF8 awareness flag in plugin.yml

- I think it only does something if you use JavaPlugin#getConfig(), but it does not harm either

AreaShop/src/main/resources/plugin.yml

@@ -11,6 +11,8 @@ commands:
     description: 'For all commands use /as help.'
     usage: 'AreaShop has not started correctly, check the log file (or console) and correct any errors.'
     aliases: [as]
+awareness:
+  - !@UTF8
 permissions:
   areashop.*:
     description: Give access to all commands of AreaShop