v1.3.7rc1 django [4.2, 6.0)

What's Changed

• Catch warnings as errors in pytest by @mschoettle in #283
• ci: add django versions to CI matrix by @mschoettle in #306
• Fix migrating db that isn't past squashed migration by @PaarthShah in #304

New Contributors

• @PaarthShah made their first contribution in #304

Full Changelog: v1.3.7.b3...v1.3.7.rc1