0.9.0

• Fix: Update phpunit/phpunit (#63), by @localheinz
• Fix: Set indent size of Makefile to 4 spaces (#67), by @localheinz
• Fix: Allow installation of sebastian/diff:^2.0 in development (#65), by @localheinz
• Enhancement: Use phpstan/phpstan-strict-rules (#66), by @localheinz
• Enhancement: Update localheinz/php-cs-fixer-config (#69), by @localheinz
• Enhancement: Add configuration for probot-stale bot (#70), by @localheinz
• Fix: Update localheinz/php-cs-fixer-config (#71), by @localheinz
• AppVeyor configuration (#72), by @WyriHaximus
• Enhancement: Tweak AppVeyor integration (#73), by @localheinz
• Enhancement: Split auto review tests from unit tests (#75), by @localheinz
• Fix: Make implicit dependency on symfony/console explicit (#76), by @localheinz
• Fix: Use void return type (#77), by @localheinz
• Fix: Simplify imports (#79), by @localheinz
• Fix: Normalize composer.json (#81), by @localheinz
• Fix: Update composer.lock (#82), by @localheinz
• Fix: Overrride BaseCommand's initialize() (#83), by @localheinz
• Enhancement: Update localheinz/php-cs-fixer-config (#84), by @localheinz
• Recommend only updating the lock file in exception (#86), by @svenluijten
• Fix: Do not attempt to fetch and modify properties of something that isn't an object (#87), by @localheinz
• Enhancement: Sort scripts-descriptions (#89), by @localheinz