When running brew upgrade xxxx, I am getting Error: Your Xcode (8.3.3) is too outdated. Please update to Xcode 9.0 (or delete it). Xcode can be updated from https://developer.apple.com/download/more/.
This seems a harsh position since 8.3.3 is the current release and 9.0 is only in BETA (and not stable yet).
Is there someway to ignore this warning? The upgrade command wont work because of it.