Error in XCode 15. Property 'completionBlock' with type '(() -> Void)?' cannot override a property with type '(@Sendable () -> Void)?'

[barabashd]

This library will now build using XCode 15.

Solution: Remove deprecated completionBlock of add '@Sendable'.

""" @available(*, deprecated, message: "use BlockObserver completions instead") override open var completionBlock: (@Sendable () -> Void)? { """