0.3.0

• Fix: Remove empty setUp() (#29), by @localheinz
• Fix: Assert sameness, not just equality (#28), by @localheinz
• Enhancement: Extract changelog into separate file (#36), by @localheinz
• Fix: Drop support for HHVM (#35), by @localheinz
• Fix: Add missing reference (#37), by @localheinz
• Enhancement: Switch to GitHub Actions (#38), by @localheinz
• Fix: Configure platform (#39), by @localheinz
• Fix: Require phpunit/phpunit (#33), by @mark-gerarts
• Variant to Node, constructor is in the Node class instead of Trait (#30), by @asalazar-pley
• Fix: Update CHANGELOG.md (#40), by @localheinz
• Enhancement: Validate composer.json and composer.lock (#41), by @localheinz
• Enhancement: Add configuration for Dependabot (#44), by @localheinz
• Fix: Condition (#46), by @localheinz
• Enhancement: Add workflow for creating release (#45), by @localheinz
• Enhancement: Add support for PHP 7.1 (#47), by @localheinz
• Enhancement: Add support for PHP 7.2 (#48), by @localheinz
• Enhancement: Add support for PHP 7.3 (#49), by @localheinz
• Enhancement: Add support for PHP 7.4 (#50), by @localheinz
• Fix: Limit range of PHP versions (#51), by @localheinz
• Enhancement: Use ergebnis/composer-normalize to normalize composer.json (#52), by @localheinz