Make init method public to support programatical usage

Author: kpavankotesh

KWVerificationCodeView/Classes/KWVerificationCodeView.swift

@@ -127,7 +127,7 @@ public protocol KWVerificationCodeViewDelegate: class {
   weak public var delegate: KWVerificationCodeViewDelegate?
 
   // MARK: - Lifecycle
-  override init(frame: CGRect) {
+  override public init(frame: CGRect) {
     super.init(frame: frame)
 
     setup()