README.md in truemail-rspec-0.2.0 vs README.md in truemail-rspec-0.2.1

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+ new
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 [![Maintainability](https://api.codeclimate.com/v1/badges/d23d82c1c1bdbc271b81/maintainability)](https://codeclimate.com/github/truemail-rb/truemail-rspec/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/d23d82c1c1bdbc271b81/test_coverage)](https://codeclimate.com/github/truemail-rb/truemail-rspec/test_coverage) [![CircleCI](https://circleci.com/gh/truemail-rb/truemail-rspec/tree/master.svg?style=svg)](https://circleci.com/gh/truemail-rb/truemail-rspec/tree/master) [![Gem Version](https://badge.fury.io/rb/truemail-rspec.svg)](https://badge.fury.io/rb/truemail-rspec) [![Downloads](https://img.shields.io/gem/dt/truemail-rspec.svg?colorA=004d99&colorB=0073e6)](https://rubygems.org/gems/truemail-rspec) [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 
 `truemail-rspec` gem helps you create `Truemail::Configuration` and `Truemail::Validator` instances for your RSpec environment.
 
+> Actual and maintainable documentation :books: for developers is living [here](https://truemail-rb.org/truemail-rspec).
+
 ## Table of Contents
 
 - [Features](#features)
 - [Requirements](#requirements)
 - [Installation](#installation)