2.1.0

• Enhancement: Update phpstan/phpstan and friends (#281), by @localheinz
• Enhancement: Synchronize with ergebnis/php-library-template (#282), by @localheinz
• Update README.md links (#284), by @kubawerlos
• Build(deps-dev): Bump jangregor/phpstan-prophecy from 0.5.0 to 0.5.1 (#283), by @dependabot-preview[bot]
• Enhancement: Require phpstan/phpstan-phpunit (#285), by @localheinz
• Fix: Run make coding-standards (#286), by @localheinz
• Compare local and online schema.json in CI (#275), by @szepeviktor
• Enhancement: Add badge for schema (#287), by @localheinz
• Enhancement: Commit updated schema back to master (#288), by @localheinz
• Fix: Use personal access token (#289), by @localheinz
• Fix: Run schema workflow every hour (#290), by @localheinz
• Enhancement: Show diff (#291), by @localheinz
• Enhancement: Compile, sign, and upload composer-normalize.phar on tag (#292), by @localheinz