Release 0.29.0

[knope-bot]

Important

Merging this pull request will create this release

Breaking Changes

• Drop support for Python 3.10
• Raise minimum httpx version to 0.23.1

Features

• replace python-dateutil with stdlib datetime.fromisoformat (feat: replace python-dateutil with stdlib datetime.fromisoformat #1429)

Fixes

• Remove some generated casts that aren't necessary with mypy v2 (fix: Remove some generated casts that aren't necessary with mypy v2 #1436)
• Explicitly set boundary for multipart/form-data (fix: Explicitly set boundary for multipart/form-data #1005)