[feature request] please add PAPIProxyBridge support in slp

[Everts0n]

Thanks to this, it will be possible to use PlaceholderAPI not only on bukkit servers, but also on proxies. I would really like to see this feature in your plugin:)

PAPI proxy bridge: https://www.spigotmc.org/resources/papiproxybridge.108415/
https://hangar.papermc.io/William278/PAPIProxyBridge