[Changelog] Update changelog

Q             | A
 ------------- | ---
Bug fix?      | yes
New feature?  | no
BC breaks?    | no
Deprecations? | no
Tests pass?   | yes
Fixed tickets | none
Refs tickets  | none
License       | MIT
Doc PR        | none

Merge changelog of https://github.com/zikula/core/blob/1.3.9/src/docs/CHANGELOG