Update dependency jeboehm/mailserver-admin to v2.0.6

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
jeboehm/mailserver-admin	patch	2.0.5 -> 2.0.6

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Release Notes

jeboehm/mailserver-admin

### [`v2.0.6`](https://togithub.com/jeboehm/mailserver-admin/releases/tag/2.0.6) [Compare Source](https://togithub.com/jeboehm/mailserver-admin/compare/2.0.5...2.0.6) ##### [2.0.6](https://togithub.com/jeboehm/mailserver-admin/compare/2.0.5...2.0.6) (2022-05-25) ##### Bug Fixes - Update dependency easycorp/easyadmin-bundle to v4.2.1 ([#​68](https://togithub.com/jeboehm/mailserver-admin/issues/68)) ([bdc1ce7](https://togithub.com/jeboehm/mailserver-admin/commit/bdc1ce7e2fd2026cf238a5ae32006ff2684c7b24)) ##### Tests - Improve functional tests, fix CI environment setup ([61080d2](https://togithub.com/jeboehm/mailserver-admin/commit/61080d26b0083b9ee0d9ee9548b8ec12799965b0))

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