Bump gem version

Author: tutelaris

README.md

@@ -48,7 +48,7 @@ To install the gem, execute:
 gem install elastic-site-search
 ```
 
-Or place `gem 'elastic-site-search', '~> 2.1.0` in your `Gemfile` and run `bundle install`.
+Or place `gem 'elastic-site-search', '~> 2.2.0` in your `Gemfile` and run `bundle install`.
 
 > **Note:** This client has been developed for the [Elastic Site Search](https://www.elastic.co/products/site-search/service) API endpoints only.
 

lib/elastic/site-search/version.rb

@@ -1,5 +1,5 @@
 module Elastic
   module SiteSearch
-    VERSION = "2.1.0"
+    VERSION = "2.2.0"
   end
 end