Merge pull request CakeDC#1166 from CakeDC/feature/prepare-release-16

prepare release 16

Update README.md

Merge pull request CakeDC#1146 from CakeDC/feature/fix-cs

phpcs fix

 update patch version to 1 and add changelog entry for 15.1.1

fix cl

fix cl

Merge pull request CakeDC#1132 from CakeDC/hotifx/backport-validation…

…-fix

fix tests failing

changelog

Merge pull request CakeDC#1124 from CakeDC/issue/update-readme-changelog

Update changelog and readme

Merge pull request CakeDC#1116 from CakeDC/feature/magic-link

Feature/magic link