Update README, remove Virtus (unmaintained)

Author: picandocodigo

README.md

@@ -17,28 +17,6 @@ This repository contains various Ruby and Rails integrations for [Elasticsearch]
 Elasticsearch client and Ruby API is provided by the
 **[elasticsearch-ruby](https://github.com/elastic/elasticsearch-ruby)** project.
 
-## Compatibility
-
-The libraries are compatible with Ruby 2.4 and higher.
-
-The version numbers follow the Elasticsearch major versions. The `master` branch is compatible with
-the Elasticsearch `master` branch, therefore, with the next major version.
-
-| Rubygem       |   | Elasticsearch |
-|:-------------:|:-:| :-----------: |
-| 0.1           | → | 1.x           |
-| 2.x           | → | 2.x           |
-| 5.x           | → | 5.x           |
-| 6.x           | → | 6.x           |
-| 7.x           | → | 7.x           |
-| master        | → | master        |
-
-Use a release that matches the major version of Elasticsearch in your stack. Each client version is
-backwards compatible with all minor versions of the same major version.
-
-Check out [Elastic product end of life dates](https://www.elastic.co/support/eol)
-to learn which releases are still actively supported and tested.
-
 ## Installation
 
 Install each library from [Rubygems](https://rubygems.org/gems/elasticsearch):
@@ -53,6 +31,24 @@ gem 'elasticsearch-model', github: 'elastic/elasticsearch-rails', branch: '5.x'
 gem 'elasticsearch-rails', github: 'elastic/elasticsearch-rails', branch: '5.x'
 ```
 
+## Compatibility
+
+The libraries are compatible with Ruby 2.4 and higher.
+
+The version numbers follow the Elasticsearch major versions. The `master` branch is compatible with the latest Elasticsearch stack stable release.
+
+| Rubygem       |   | Elasticsearch |
+|:-------------:|:-:| :-----------: |
+| 0.1           | → | 1.x           |
+| 2.x           | → | 2.x           |
+| 5.x           | → | 5.x           |
+| 6.x           | → | 6.x           |
+| master        | → | 7.x           |
+
+Use a release that matches the major version of Elasticsearch in your stack. Each client version is backwards compatible with all minor versions of the same major version.
+
+Check out [Elastic product end of life dates](https://www.elastic.co/support/eol) to learn which releases are still actively supported and tested.
+
 ## Usage
 
 This project is split into three separate gems:
@@ -108,10 +104,8 @@ rails new searchapp --skip --skip-bundle --template https://raw.github.com/elast
 Example of using Elasticsearch as a repository for a Ruby domain object:
 
 ```ruby
-require 'virtus'
 class Article
-  include Virtus.model
-  attribute :title, String
+  attr_accessor :title
 end
 
 require 'elasticsearch/persistence'

elasticsearch-model/README.md

@@ -1,26 +1,22 @@
 # Elasticsearch::Model
 
-The `elasticsearch-model` library builds on top of the
-the [`elasticsearch`](https://github.com/elastic/elasticsearch-ruby) library.
+The `elasticsearch-model` library builds on top of the the [`elasticsearch`](https://github.com/elastic/elasticsearch-ruby) library.
 
-It aims to simplify integration of Ruby classes ("models"), commonly found
-e.g. in [Ruby on Rails](http://rubyonrails.org) applications, with the
-[Elasticsearch](https://www.elastic.co) search and analytics engine.
+It aims to simplify integration of Ruby classes ("models"), commonly found e.g. in [Ruby on Rails](http://rubyonrails.org) applications, with the [Elasticsearch](https://www.elastic.co) search and analytics engine.
 
 ## Compatibility
 
-This library is compatible with Ruby 1.9.3 and higher.
+This library is compatible with Ruby 2.4 and higher.
 
-The library version numbers follow the Elasticsearch major versions, and the `master` branch
-is compatible with the Elasticsearch `master` branch, therefore, with the next major version.
+The library version numbers follow the Elasticsearch major versions. The `master` branch is compatible with the latest Elasticsearch stack stable release.
 
 | Rubygem       |   | Elasticsearch |
 |:-------------:|:-:| :-----------: |
 | 0.1           | → | 1.x           |
 | 2.x           | → | 2.x           |
 | 5.x           | → | 5.x           |
 | 6.x           | → | 6.x           |
-| master        | → | master        |
+| master        | → | 7.x           |
 
 ## Installation
 
@@ -73,9 +69,7 @@ This will extend the model with functionality related to Elasticsearch.
 
 #### Feature Extraction Pattern
 
-Instead of including the `Elasticsearch::Model` module directly in your model,
-you can include it in a "concern" or "trait" module, which is quite common pattern in Rails applications,
-using e.g.  `ActiveSupport::Concern` as the instrumentation:
+Instead of including the `Elasticsearch::Model` module directly in your model, you can include it in a "concern" or "trait" module, which is quite common pattern in Rails applications, using e.g.  `ActiveSupport::Concern` as the instrumentation:
 
 ```ruby
 # In: app/models/concerns/searchable.rb
@@ -290,11 +284,8 @@ NOTE: It is _not_ possible to chain other methods on top of the `records` object
 
 #### Pagination
 
-You can implement pagination with the `from` and `size` search parameters. However, search results
-can be automatically paginated with the [`kaminari`](http://rubygems.org/gems/kaminari) or
-[`will_paginate`](https://github.com/mislav/will_paginate) gems.
-(The pagination gems must be added before the Elasticsearch gems in your Gemfile,
-or loaded first in your application.)
+You can implement pagination with the `from` and `size` search parameters. However, search results can be automatically paginated with the [`kaminari`](http://rubygems.org/gems/kaminari) or [`will_paginate`](https://github.com/mislav/will_paginate) gems.
+(The pagination gems must be added before the Elasticsearch gems in your Gemfile, or loaded first in your application.)
 
 If Kaminari or WillPaginate is loaded, use the familiar paging methods:
 
@@ -322,8 +313,7 @@ Elasticsearch::Model::Response::Response.__send__ :include, Elasticsearch::Model
 
 #### The Elasticsearch DSL
 
-In most situations, you'll want to pass the search definition
-in the Elasticsearch [domain-specific language](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html) to the client:
+In most situations, you'll want to pass the search definition in the Elasticsearch [domain-specific language](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html) to the client:
 
 ```ruby
 response = Article.search query:     { match:  { title: "Fox Dogs" } },
@@ -333,8 +323,7 @@ response.results.first.highlight.title
 # ["Quick brown <em>fox</em>"]
 ```
 
-You can pass any object which implements a `to_hash` method, which is called automatically,
-so you can use a custom class or your favourite JSON builder to build the search definition:
+You can pass any object which implements a `to_hash` method, which is called automatically, so you can use a custom class or your favourite JSON builder to build the search definition:
 
 ```ruby
 require 'jbuilder'
@@ -354,8 +343,7 @@ response.results.first.title
 # => "Quick brown fox"
 ```
 
-Also, you can use the [**`elasticsearch-dsl`**](https://github.com/elastic/elasticsearch-ruby/tree/master/elasticsearch-dsl) library, which provides a specialized Ruby API for
-the Elasticsearch Query DSL:
+Also, you can use the [**`elasticsearch-dsl`**](https://github.com/elastic/elasticsearch-ruby/tree/master/elasticsearch-dsl) library, which provides a specialized Ruby API for the Elasticsearch Query DSL:
 
 ```ruby
 require 'elasticsearch/dsl'

elasticsearch-persistence/Gemfile

@@ -24,8 +24,6 @@ gem 'elasticsearch-model',
     path: File.expand_path('../elasticsearch-model', __dir__),
     require: false
 
-gem 'virtus'
-
 group :development, :testing do
   gem 'pry-nav'
   gem 'rspec'

elasticsearch-persistence/README.md

@@ -4,18 +4,17 @@ Persistence layer for Ruby domain objects in Elasticsearch, using the Repository
 
 ## Compatibility
 
-This library is compatible with Ruby 1.9.3 and higher.
+This library is compatible with Ruby 2.4 and higher.
 
-The library version numbers follow the Elasticsearch major versions, and the `master` branch
-is compatible with the Elasticsearch `master` branch, therefore, with the next major version.
+The library version numbers follow the Elasticsearch major versions. The `master` branch is compatible with the latest Elasticsearch stack stable release.
 
 | Rubygem       |   | Elasticsearch |
 |:-------------:|:-:| :-----------: |
 | 0.1           | → | 1.x           |
 | 2.x           | → | 2.x           |
 | 5.x           | → | 5.x           |
 | 6.x           | → | 6.x           |
-| master        | → | master        |
+| master        | → | 7.x           |
 
 ## Installation