force_unwrapping: False positive on IUO closure property declaration

[ldiqual]

private var myProperty: (Void -> Void)! // Line 30

triggers

/path/code.swift:30:50: warning: Force Unwrapping Violation: Force unwrapping should be avoided. (force_unwrapping)

[pwc3]

I ran into the same thing. Adding a typealias for the block type works around the issue, but in this case, I just added a // swiftlint:disable:this force_unwrapping comment.