Add clear functionality in KWVerificationCodeView and update podspec version

Author: kpavankotesh

KWVerificationCodeView.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'KWVerificationCodeView'
-  s.version          = '0.1.8'
+  s.version          = '0.1.9'
   s.summary          = 'A verification code view with validation.'
   s.description      = 'A customisable verification code view with built in validation. Can be used for one time passwords (OTPs), email verification codes etc.'
   s.homepage         = 'https://github.com/keepworks/kwverificationcodeview'

KWVerificationCodeView/Classes/KWVerificationCodeView.swift

@@ -167,6 +167,14 @@ public protocol KWVerificationCodeViewDelegate: class {
     return true
   }
 
+  public func clear() {
+    for textFieldView in textFieldViews {
+      textFieldView.numberTextField.text = ""
+    }
+    
+    textFieldViews[0].activate()
+  }
+  
   // MARK: - Private Methods
   private func setup() {
     loadViewFromNib()