Bug fixes and bump pydantic & python supported versions

0.20.2

🐛 Fixes

• Fix mutable default argument in translate list to dict - thanks @cadlagtrader #1382
• Fix fastapi docs - thanks @inktrap #1362
• Fix clashing many to many fields names #1407

💬 Other

• Add official support for python 3.12 - thanks @ChristopherMacGown #1395
• Unpin pydantic allowing pydantic versions <2.9.0 - thanks @camillol #1388