Fix warnings (#680)

Lock/DatabaseView.swift

@@ -22,7 +22,7 @@
 
 import UIKit
 
-protocol DatabaseView: class, View {
+protocol DatabaseView: AnyObject, View {
     var form: Form? { get }
     var secondaryButton: SecondaryButton? { get }
     var primaryButton: PrimaryButton? { get }

Lock/Form.swift

@@ -22,7 +22,7 @@
 
 import Foundation
 
-protocol Form: class {
+protocol Form: AnyObject {
     var onValueChange: (InputField) -> Void { get set }
     var onReturn: (InputField) -> Void { get set }
     var onSubmit: (InputField) -> Bool { get set }

Lock/PrimaryButton.swift

@@ -36,7 +36,7 @@ class PrimaryButton: UIView, Stylable {
         }
     }
 
-    var title: String? = nil {
+    var title: String? {
         didSet {
             guard let button = self.button else { return }
             self.layout(title: self.title, inButton: button)

Lock/Validators.swift

@@ -115,7 +115,7 @@ public class EmailValidator: InputValidator {
     }
 }
 
-protocol PasswordPolicyValidatorDelegate: class {
+protocol PasswordPolicyValidatorDelegate: AnyObject {
     func update(withRules rules: [RuleResult])
 }
 

LockTests/Interactors/DatabaseInteractorSpec.swift

@@ -20,6 +20,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
+import UIKit
 import Quick
 import Nimble
 import Auth0