4.0.3 - 2022/06/07

* 2021-11-16 [BUGFIX] Fix composer dependencies (Thanks to Christian Wolfram)
* 2021-12-17 [BUGFIX] Fix parameter order in implode function (Thanks to Christian Wolfram)
* 2022-06-02 [TASK] Update dev-dependency to cs-fixer (Thanks to Daniel Goerz)
* 2022-06-07 [TASK] Remove require_dev section from composer.json
* 2022-06-07 [TASK] #21 - Don't allow to add relations in MM_opposite_field

There is still one open TODO: Test, what happens when there are nested mountpoints.