add changelog entries for hopefully all changes since 0.16

Changelog.md

@@ -7,6 +7,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Add
+- ability to edit job offers by reviewers after submission
+- ability for reviewers to filter for offer requiring review
+- ability to change/remove default footer links and add new ones
+
+### Change
+- improve error handling
+- split of two small packages 
+- a lot of refactoring
+- update/upgrade dependencies
+- reviewer-only settings when not logged in are now an error rather than being silently ignored
+- delete expired will now goto a preview instead of deleting directly
+
 ## [0.1.6] (2022-05-26)
 
 ### Change