Update frontend library version to 0.8.0

CHANGELOG.md

@@ -1,6 +1,13 @@
 # NHS.UK frontend Changelog
 
-## 0.7.0 (Prerelease) - Jan 2, 2018
+## 0.8.0 (Prerelease) - Jan 17, 2019
+
+:boom: **Breaking changes**
+
+- Header - The autocomplete has been rewritten to remove the dependency on jQuery and now uses [GOV.UK's accessible autocomplete component](https://github.com/alphagov/accessible-autocomplete). You will need to do an `npm install` to update your packages and update the header HTML accordingly. ([PR 342](https://github.com/nhsuk/nhsuk-frontend/pull/342))
+
+
+## 0.7.0 (Prerelease) - Jan 2, 2019
 
 :new: **New features**