Swift 3.0 Maintenance

[mliberatore]

What it Does

Maintenance work for Xcode 8.2.

• Sets swift version in PinpointKit target of PinpointKit.xcodeproj
• Adds a file that was missing when building PinpointKit.xcodeproj in its own project (not Example workspace).
• Accepts Xcode’s recommended updates:

How to Test

1. Create a new Xcode project (Single View Application)
2. Run pod init
3. Run open Podfile and add pod 'PinpointKit', :git => 'https://github.com/Lickability/PinpointKit.git', :branch => 'swift-3.0-maintenance' to your target.
4. Run pod install
5. Close the project and open the newly created workspace
6. Choose "Later" when prompted to convert to current Swift syntax
7. Build without any warnings / errors
8. Open ViewController.swift and replace the contents with the snippet at the end of this series of steps.
9. Build and Run, verifying that PinpointKit’s UI appears

import UIKit
import PinpointKit

class ViewController: UIViewController {

    let pinpointKit = PinpointKit(feedbackRecipients: ["something@example.com"])

    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(true)

        pinpointKit.show(from: self)
    }
}

[bcapps]

Everything here looks good 👍 But I'm still seeing the same white blinking issue in this new project that I saw in #195, which points to it probably being a pre-existing issue.