v1.7.0: Added Update checker

This versions add an update checker.
To use it, you have to add check_updates: true to your config,yml.

When enabled will AdvancedServerList check for a new update at Modrinth every 12 hours. If it finds a new update will it inform you about it.
The updates are checked against the plugin's respective platform, meaning that the Spigot version only checks versions for the Spigot platform.

Please report any issues on the issue tracker or in my Discord Server.