Implement SPM support (#646)

Author: Widcket

.gitignore

@@ -31,6 +31,11 @@ examples/**/Pods/
 # Carthage
 Carthage/
 
+# SPM
+.swiftpm
+.build
+Package.resolved
+
 #Fabric
 .fabric_key
 

App/ViewController.swift

@@ -105,7 +105,7 @@ class ViewController: UIViewController {
                     .withOptions {
                         applyDefaultOptions(&$0)
                         $0.allow = [.Login]
-                        $0.usernameStyle = [.Email]
+                        $0.usernameStyle = [.Username]
                     }
                     .withConnections { connections in
                         connections.database(name: "Username-Password-Authentication", requiresUsername: true)
@@ -116,6 +116,7 @@ class ViewController: UIViewController {
                     .classic()
                     .withOptions {
                         applyDefaultOptions(&$0)
+                        $0.usernameStyle = [.Username]
                     }
                     .withConnections { connections in
                         connections.social(name: "apple", style: .Apple)

Lock/AuthPresenter.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 class AuthPresenter: Presentable, Loggable {
 

Lock/CustomTextField.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 public struct CustomTextField {
 

Lock/EnterpriseDomainPresenter.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 class EnterpriseDomainPresenter: Presentable, Loggable {
 

Lock/Extensions.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 extension Optional {
 

Lock/Layout.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 // MARK: - NSLayoutXAxisAnchor
 @discardableResult func constraintEqual<C: NSLayoutAnchor<NSLayoutXAxisAnchor>>(anchor: C, toAnchor anotherAnchor: C, constant: CGFloat? = nil, priority: UILayoutPriority = UILayoutPriority.priorityRequired) -> NSLayoutConstraint {

Lock/LazyImage.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 
 /**
  *  Convenience struct to hold an image reference to a `NSBundle` without loading the `UIImage`.

Lock/Lock.swift

@@ -21,6 +21,7 @@
 // THE SOFTWARE.
 
 import Foundation
+import UIKit
 import Auth0
 
 /// Lock main class to configure and show the native widget

Lock/MessageView.swift

@@ -20,6 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+import Foundation
 import UIKit
 
 class MessageView: UIView {