CHANGELOG.md in oauth2_api_client-2.1.0 vs CHANGELOG.md in oauth2_api_client-3.0.0

@@ -1,7 +1,15 @@
 
 # CHANGELOG
 
+# v3.0.0
+
+* [BREAKING] Renamed `Oauth2ApiClient::HttpError` to
+  `Oauth2ApiClient::ResponseError`
+* Added http error exception classes like e.g.
+  `Oauth2ApiClient::ResponseError::NotFound`,
+  `Oauth2ApiClient::ResponseError::InternalServerError`, etc.
+
 # v2.1.0
 
 * Include the response code and body in `HttpError#to_s`
 
 # v2.0.0