5.4.0

What's Changed

• Update yoast/phpunit-polyfills requirement from ^2.0 to ^3.0 by @dependabot in #488
• Allow "Approve & Always Allow" only for Webmentions by @pfefferle in #491
• Check for missing format property by @dshanske in #494
• Add single ClassicPress Unit Test by @dshanske in #495
• Use readme.md as main readme by @pfefferle in #496
• Allow readme.md by @pfefferle in #498
• Add setting for avatar store by @dshanske in #501
• Remove Webmention Dependence on Pings by @dshanske in #485
• Bump @wordpress/components from 28.13.0 to 29.4.0 by @dependabot in #510
• Improve and simplify the plugin loader by @pfefferle in #509
• Finally implement async processing by @pfefferle in #500

Full Changelog: 5.3.3...5.4.0