5.2.0

What's Changed

• drop python 3.9 support by @braingram in #1992
• remove asdf-transform-schemas dependency by @braingram in #1965
• Fix validator handling of repeated nodes and schema combiners by @braingram in #1999
• Remove pytest-remotedata by @braingram in #2006

Full Changelog: 5.1.0...5.2.0