bumping to v4.0.0

CHANGELOG.md

@@ -6,9 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [4.0.0] - 2022-03-29
+### Common
+#### Modified
+- Made a bunch of dep updates, all through dependabot so full list will be easy to get (`git log v3.2.1..HEAD --author=dependabot --pretty=oneline`).
+
 ### Server
 #### Modified
-- Changing `--search-attributes` to `--extra-attributes`, fixing extra attributes not being processed and added to the user object
+- Changing `--search-attributes` to `--extra-attributes`, fixing extra attributes not being processed and added to the user object. This is the change triggering a major update since the interface changed.
 
 ## [3.2.1] - 2021-11-10
 ### Client