README.md in intercom-2.2.4 vs README.md in intercom-2.3.0

@@ -17,11 +17,11 @@
 
     gem install intercom
 
 Using bundler:
 
-    gem 'intercom', "~> 2.2.4"
+    gem 'intercom', "~> 2.3.0"
 
 ## Basic Usage
 
 ### Configure your access credentials
 
@@ -326,11 +326,11 @@
 ```
 
 Note that models generated from webhook notifications might differ slightly from models directly acquired via the API. If this presents a problem, calling `payload.load` will load the model from the API using the `id` field.
 
 ### Errors
-You do not need to deal with the HTTP response from an API call directly. If there is an unsuccessful response then an error that is a subclass of Intercom:Error will be raised. If desired, you can get at the http_code of an Intercom::Error via it's `http_code` method.
+You do not need to deal with the HTTP response from an API call directly. If there is an unsuccessful response then an error that is a subclass of Intercom:Error will be raised. If desired, you can get at the http_code of an Intercom::Error via its `http_code` method.
 
 The list of different error subclasses are listed below. As they all inherit off Intercom::Error you can choose to rescue Intercom::Error or
 else rescue the more specific error subclass.
 
 ```ruby
@@ -341,9 +341,10 @@
 Intercom::ResourceNotFound
 Intercom::BadRequestError
 Intercom::RateLimitExceeded
 Intercom::AttributeNotSetError # Raised when you try to call a getter that does not exist on an object
 Intercom::MultipleMatchingUsersError
+Intercom::HttpError # Raised when response object is unexpectedly nil
 ```
 
 ### Rate Limiting
 
 Calling `Intercom.rate_limit_details` returns a Hash that contains details about your app's current rate limit.