[Feature] - Auto Update functionality

[MineFact]

Is your feature request related to a problem? Please describe
Currently all Build Teams have to update the Plot System Terra Plugin manually, when a new version comes out.
As soon as the Global Plot System is released, this could be a huge problem whenever we change something fundamental on the system that could cause some teams to not work properly anymore.
The more teams connect to the Global Plot System the harder it would be to get all teams to update their server as quick as possible.

Describe the solution you'd like
An auto update functionality is already implemented in the BuildTeamTools plugin (https://github.com/BuildTheEarth/BuildTeamTools) and works very well.
Whenever a new version is released on spigotmc (https://www.spigotmc.org/resources/buildteamtools.101854/) the server automatically downloads that update and replaces it once the server gets restarted.