Update keyboard to numeric to input SMS code auth0#2

Update keyboard to numeric to input SMS code
Related to auth0#402
but using proper value UIKeyboardTypeNumberPad instead of UIKeyboardTypePhonePad
and changing the proper file :)

Lock/UI/Private/A0CredentialFieldView.m

@@ -98,7 +98,7 @@ - (void)setType:(A0CredentialFieldViewType)type {
         case A0CredentialFieldViewOTPCode:
             self.placeholderText = A0LocalizedString(@"Verification Code");
             self.textField.secureTextEntry = YES;
-            self.textField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
+            self.textField.keyboardType = UIKeyboardTypeNumberPad;
             self.iconImageView.image = [[theme imageForKey:A0ThemeIconLock] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
     }
     self.textField.autocorrectionType = UITextAutocorrectionTypeNo;