Support for new version of BungeeCord

[Dymeth]

>bpm reload ProxyAuth
CONSOLE executed command: /bpm reload ProxyAuth
Error occured while loading plugin, see console for more details
java.lang.IllegalStateException: Error while loading plugin ProxyAuth.jar
    at bungeepluginmanager.PluginUtils.loadPlugin(PluginUtils.java:181)
    at bungeepluginmanager.Commands.execute(Commands.java:102)
    at net.md_5.bungee.api.plugin.PluginManager.dispatchCommand(PluginManager.java:207)
    at net.md_5.bungee.api.plugin.PluginManager.dispatchCommand(PluginManager.java:157)
    at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:56)
    at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)
Caused by: java.lang.NoSuchMethodException: net.md_5.bungee.api.plugin.PluginClassloader.<init>(net.md_5.bungee.api.ProxyServer, net.md_5.bungee.api.plugin.PluginDescription, [Ljava.net.URL;)
    at java.base/java.lang.Class.getConstructor0(Class.java:3349)
    at java.base/java.lang.Class.getDeclaredConstructor(Class.java:2553)
    at bungeepluginmanager.PluginUtils.loadPlugin(PluginUtils.java:170)
    ... 5 more

It seems that support for the new version is already present in this project. In this case, I think it will be enough to publish the current plugin assembly on SpigotMC