Update CHANGELOG

Author: pluma

CHANGELOG.md

@@ -14,6 +14,14 @@ This driver uses semantic versioning:
 - A change in the major version (e.g. 1.Y.Z -> 2.0.0) indicates _breaking_
   changes that require changes in your code to upgrade.
 
+## [Unreleased]
+
+### Changed
+
+- Inlined `x3-linkedlist` dependency
+
+  Inlining this dependency should help make arangojs more portable.
+
 ## [9.0.0-preview.1]
 
 This is a major release and breaks backwards compatibility.
@@ -1864,6 +1872,7 @@ For a detailed list of changes between pre-release versions of v7 see the
 
   Graph methods now only return the relevant part of the response body.
 
+[unreleased]: https://github.com/arangodb/arangojs/compare/v9.0.0-preview.1...HEAD
 [9.0.0-preview.1]: https://github.com/arangodb/arangojs/compare/v8.8.1...v9.0.0-preview.1
 [8.8.1]: https://github.com/arangodb/arangojs/compare/v8.8.0...v8.8.1
 [8.8.0]: https://github.com/arangodb/arangojs/compare/v8.7.0...v8.8.0