Added

CommandClient#waitFor<T: Event>(predicate, timeout)
- This makes use of the reified keyword so you can do things like client.waitFor<MessageReceivedEvent>({ true }, 3000)
FlightInfo.GIT_REVISION
- This allows you to pinpoint which specific commit of Flight you're working with.

Removed

AwaitTimeoutException
- Figured this didn't have any specific purpose when a TimeoutException already existed.

CommandClient now uses EventListener instead of extending ListenerAdapter.
- This means that Flight will only process events it needs to, which should offer slightly better performance.
- This also has the added benefit of allowing internal hooks such as onMessageReceived to be private. Nothing exciting but should yield a less cluttered auto-complete list for anyone that works with the CommandClient.
BadArgument is thrown once again when an argument couldn't be resolved for a parameter that already had a default.
- This should offer a better end-user experience when parsing fails but argument execution still proceeded. Users shall be confused no more!
- Trivia: This was added in 1.4.4 but was never actually published as a release because it was such a small change
  - looks at Flight 1.4.3
The CompletableFuture returned by waitFor now has a non-null result type.
- This was left over from an earlier Flight version that completed with null on timeout, but now we just throw an exception instead.
FlightInfo.VERSION and FlightInfo.GIT_REVISION are now updated at build-time.