v3.0.6

[ShindouMihou]

A short update that includes some interesting new things:

• Added support for VelenObserver#observeServer, it should now automatically update, create server-specific commands as long as you want it.
• Changed return type of VelenObserver#observe from void to CompletableFuture<Void> to allow for blocking, this applies to the above.
• Added our own custom CLI called Velen CLI which is written in Rust, read more @ https://github.com/ShindouMihou/Velen/tree/master/cli-core

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This discussion was created from the release v3.0.6.