v6.1.0

What's Changed

• change links, add mkdocs, dependabot, update github actions by @Grotax in #1
• fix docs build by @Grotax in #2
• Docs/fix by @Grotax in #3
• update composer file by @Grotax in #4
• add link to packagist to readme by @Grotax in #11
• If "Link" does not exist, then set it based on "guid" (PublicId.php) by @Grotax in #12
• Code Quality by @Grotax in #16
• Fix: Analysis of relative links (Node.php) by @Grotax in #13
• Change: do no longer default to 1800-01-01 as date for fetching feeds by @OleVik in #15
• CHANGE: don't set if-modified-since header when discover feeds by @wofferl in #19
• Code quality: fix implicit null deprecations by @Grotax in #17
• Release v6.1.0 by @Grotax in #20

New Contributors

• @OleVik made their first contribution in #15
• @wofferl made their first contribution in #19

Full Changelog: v6.0.3...v6.1.0