Cancelled `get` calls forces the pool object to be detached

[Sh4d1]

Hey! I've been testing bounded fastpool for a wrapper above sqlx (based off your example), and it's pretty neat!

However, it seems that when the get call gets cancelled, depending when, a connection in an UnreadyObject could be dropped when it doesn't need to be. It could be interesting (imho) to add a way to return these to the pool instead of dropping, in my case, the connection. I guess it would only take adding another state for the object just for this? Wdyt?