Upgrade to release 3.15.0:
- Allow passing a dict to fields.Nested
- Address distutils deprecation warning in Python 3.10
- Add py310 to black target-version
- Drop support for Python 3.6
- Use postponed evaluation of annotations
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Trevor Gamblin <tvgamblin@gmail.com>
