UIKitCore con < iOS 11

[diegogarciar]

Problem Description:
Hello, a user has iOS 11 and app is crashing on

BulletinCloseButton ->configureSubviews
accessibilityLabel = Bundle.UIKitCore.localizedString(forKey: "Close", value: "Close", table: nil)

with an error of

Fatal error: Unexpectedly found nil while unwrapping an Optional value.

It seems you're force unwrapping Bundle(identifier: "com.apple.UIKitCore")! at Bundle.UIKitCore but it's not available on older OS? Anyway, a simple optional might be enough.

Steps to reproduce:
present any bulletin using an older iOS version

Environment:

• Device: iPhone 5 and 8
• OS: iOS 10.3.4 and iOS 11.4.1
• Version of BulletinBoard: 4.1.1

[diegogarciar]

I see there's already a pull request for this fix, We can close this issue when it goes to master

[alexisakers]

The fixed shipped in 5.0, thanks for your patience.