2.20.0

• Fix: Drop support for PHP 7.2 (#845), by @localheinz
• Enhancement: Use Php73 rule set (#846), by @localheinz
• composer(deps-dev): bump ergebnis/php-cs-fixer-config from 2.14.0 to 3.4.0 (#847), by @dependabot[bot]
• composer(deps-dev): bump phpunit/phpunit from 8.5.22 to 9.5.11 (#848), by @dependabot[bot]
• Fix: Migrate configuration for phpunit/phpunit (#849), by @localheinz
• Fix: Merge configuration files (#850), by @localheinz
• Fix: Update CHANGELOG.md (#851), by @localheinz