v6.0.0

• 🎉 Significant improvement on Cache-Control definition and usage
  • Cache-Control boilerplate with extensive control by @LeoColomb in #325
  • Valuable feedbacks by @Malvoz in #148
• ⚠️ Breaking: End of support for Apache httpd version 2.4.16 and below in #338
• Reorder and improve cache expiration ExpiresByType map by @LeoColomb in #326
• Add a notice for directory index with pre-compressed content by @vatonbero in #311
• Drop image/avif-sequence MIME type by @LeoColomb and @mathiasbynens in #316
• Improve inline comments.

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Full Changelog: 5.1.0...6.0.0