Update pod spec to version 1.2.4

Locksmith.podspec

@@ -9,7 +9,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "Locksmith"
-  s.version          = "1.2.3"
+  s.version          = "1.2.4"
   s.summary          = "Locksmith is a sane way to work with the iOS Keychain in Swift."
   s.description      = <<-DESC
                        Locksmith is a sane way to work with the iOS Keychain in Swift.

Pod/Classes/LocksmithRequest.swift

@@ -25,7 +25,7 @@ public enum Accessible: Int {
     WhenUnlockedThisDeviceOnly, AfterFirstUnlockThisDeviceOnly, AlwaysThisDeviceOnly
 }
 
-public class LocksmithRequest: NSObject, CustomDebugStringConvertible {
+public class LocksmithRequest: NSObject {
     // Keychain Options
     // Required
     public var service: String = LocksmithDefaultService