message: Add ConditionProcessValue class. It will be used in text preprocess and conditional to allow using arrays and nexted values:
diff: @@ -6,6 +6,7 @@ export {Base, Event, ItemValue, SurveyError, ISurvey} from "../../base";
  export {ChoicesRestfull} from "../../choicesRestfull";
  export {Condition, ConditionNode, ConditionRunner} from "../../conditions";
  export {ConditionsParser} from "../../conditionsParser";
  +export {ProcessValue} from "../../conditionProcessValue";
  export {CustomError, ExceedSizeError, RequreNumericError} from "../../error";
  export {
  JsonError, JsonIncorrectTypeError, JsonMetadata, JsonMetadataClass,
  