Method 'shared' was used as a property; add () to call it

[rlindsey2]

Hi,
Firstly, thanks so much for creating this framework it's amazing.

When updating my podfile I'm getting the compiler error "SDWebImageIntegration Method 'shared' was used as a property; add () to call it". It's on line 66 of the SDWebImageIntegration file.

Current line:
guard let operation = SDWebImageManager.shared.loadImage(with: url, options: [], progress: progress, completed: completion) else { return }

Changing it to the following fixes the issue:
guard let operation = SDWebImageManager.shared().loadImage(with: url, options: [], progress: progress, completed: completion) else { return }

Not fully aware why this might be happening?