README.md in truemail-1.5.1 vs README.md in truemail-1.6.0

@@ -1,8 +1,8 @@
 # <img src='https://repository-images.githubusercontent.com/173723932/6dffee00-e88e-11e9-94b6-c97aacc0df00' height='250' alt='Truemail - configurable framework agnostic plain Ruby email validator' />
 
-[![Maintainability](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/maintainability)](https://codeclimate.com/github/rubygarage/truemail/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/test_coverage)](https://codeclimate.com/github/rubygarage/truemail/test_coverage) [![CircleCI](https://circleci.com/gh/rubygarage/truemail/tree/master.svg?style=svg)](https://circleci.com/gh/rubygarage/truemail/tree/master) [![Gem Version](https://badge.fury.io/rb/truemail.svg)](https://badge.fury.io/rb/truemail) [![Downloads](https://img.shields.io/gem/dt/truemail.svg?colorA=004d99&colorB=0073e6)](https://rubygems.org/gems/truemail) [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
+[![Maintainability](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/maintainability)](https://codeclimate.com/github/rubygarage/truemail/maintainability) [![Test Coverage](https://api.codeclimate.com/v1/badges/657aa241399927dcd2e2/test_coverage)](https://codeclimate.com/github/rubygarage/truemail/test_coverage) [![CircleCI](https://circleci.com/gh/rubygarage/truemail/tree/master.svg?style=svg)](https://circleci.com/gh/rubygarage/truemail/tree/master) [![Gem Version](https://badge.fury.io/rb/truemail.svg)](https://badge.fury.io/rb/truemail) [![Downloads](https://img.shields.io/gem/dt/truemail.svg?colorA=004d99&colorB=0073e6)](https://rubygems.org/gems/truemail) [![Gitter](https://badges.gitter.im/truemail-rb/community.svg)](https://gitter.im/truemail-rb/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) [![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md)
 
 Configurable framework agnostic plain Ruby email validator. Verify email via Regex, DNS and SMTP. Be sure that email address valid and exists.
 
 ## Table of Contents
 
@@ -34,10 +34,11 @@
   - [JSON serializer](#json-serializer)
   - [Host audit features](#host-audit-features)
     - [PTR audit](#ptr-audit)
   - [Truemail helpers](#truemail-helpers)
     - [.valid?](#valid)
+    - [#as_json](#as_json)
   - [Test environment](#test-environment)
 - [Truemail family](#truemail-family)
 - [Contributing](#contributing)
 - [License](#license)
 - [Code of Conduct](#code-of-conduct)
@@ -926,15 +927,54 @@
 
 ### Truemail helpers
 
 #### .valid?
 
-You can use the ```.valid?``` helper for quick validation of email address. It returns a boolean:
+You can use the `.valid?` helper for quick validation of email address. It returns a boolean:
 
 ```ruby
 # It is shortcut for Truemail.validate('[e-mail]').result.valid?
 Truemail.valid?('[e-mail]')
 => true
+```
+
+#### #as_json
+
+You can use `#as_json` helper for represent `Truemail::Validator` instance as json. Under the hood it uses internal json serializer [`Truemail::Log::Serializer::Json`](#json-serializer):
+
+```ruby
+Truemail.validate('[e-mail]').as_json
+
+=>
+# Serialized Truemail::Validator instance
+{
+  "date": "2020-02-01 10:00:00 +0200",
+  "email": "[e-mail]",
+  "validation_type": "smtp",
+  "success": false,
+  "errors": {
+    "smtp": "smtp error"
+  },
+  "smtp_debug": [
+    {
+      "mail_host": "213.180.193.89",
+      "port_opened": true,
+      "connection": true,
+      "errors": {
+        "rcptto": "550 5.7.1 No such user!\n"
+      }
+    }
+  ],
+  "configuration": {
+    "validation_type_by_domain": null,
+    "whitelist_validation": false,
+    "whitelisted_domains": null,
+    "blacklisted_domains": null,
+    "smtp_safe_check": false,
+    "email_pattern": "default gem value",
+    "smtp_error_body_pattern": "default gem value"
+  }
+}
 ```
 
 ### Test environment
 
 You can stub out that validation for your test environment. Just add RSpec before action: