iOS12 Deprecation warning dimsBackgroundDuringPresentation

[landg16]

Hi,

When i changed my project target to iOS 12 i have deprecation warning:

PROJECT/iOS/Pods/CountryPickerView/CountryPickerView/CountryPickerViewController.swift:94:27: 'dimsBackgroundDuringPresentation' was deprecated in iOS 12.0

It's in CountryPickerViewController on 94th line.

Also if you'd like i can make PR.

[kizitonwose]

Yep, a PR would be nice.