CHANGELOG.md in govuk_test-0.5.0 vs CHANGELOG.md in govuk_test-1.0.0

@@ -5,9 +5,16 @@
 - Include a link to your pull request.
 - Don't include changes that are purely internal. The CHANGELOG should be a
   useful summary for people upgrading their application, not a replication
   of the commit log.
 
+## 1.0.0
+
+* BREAKING: `.configure` accepts a `chrome_options` argument of an instance of
+  `Selenium::Webdriver::Chrome::Options` rather than a hash. The `window_size`
+  argument is dropped and can be done by configuring the `chrome_options`
+  instance, [example](https://github.com/alphagov/govuk_test/blob/dfd1a82e0114dbf1c668957fbea19cea04fd0d90/spec/govuk_test_spec.rb#L12-L22).
+
 ## 0.5.0
 
 * No changes: new release for semantic versioning purposes (0.4.4 should have been 0.5.0)
 
 ## 0.4.4