v5.2.0

New Features

• Cache results for subtrees; vastly speeds up :contains and :has #1025 – by @fb55
• Add support for :read-only and :read-write pseudos #1497 – by @jed
• Improved support for large documents #1132 – by @fb55

Fixes

• Allow whitespace in :empty #795 – by @fb55
• Filter queried elements inside template element #981 – by @andolf
• Handle template tags in selectOne #1001 – by @fb55

New Contributors

• @andolf made their first contribution in #981
• @EFord36 made their first contribution in #1107
• @jed made their first contribution in #1497

Full Changelog: v5.1.0...v5.2.0