`ObjCPromise` initializer fails for arrays in Swift 6.4

[thorfroelich]

The following initializer fails its precondition under Swift 6.4 when T is an array:

public init<T>(_ objCPromise: ObjCPromise<T>) {
  guard let objCPromise = objCPromise as? ObjCPromise<AnyObject> else {
    preconditionFailure("Cannot cast \(T.self) to \(AnyObject.self)")
  }
  self.objCPromise = objCPromise
}

The function to get an ObjCPromise from a Promise (relying on the same Array → AnyObject cast) does too.

Replacing the current cast with an unsafeBitCast seems to fix the issue in both cases, but I haven't yet tested it thoroughly enough to be certain.