Marshmallow

*******************

Bug fixes:

- Typing: Fix typing for `class_registry.get_class <marshmallow.class_registry.get_class>` (:pr:`2735`).

*******************

Features:

- Typing: Improve typings in `marshmallow.fields` (:pr:`2723`).
- Typing: Replace type comments with inline typings (:pr:`2718`).

Bug fixes:

- Typing: Fix type hint for ``nested`` parameter of `Nested <marshmallow.fields.Nested>` (:pr:`2721`).

Deprecations:

- Custom validators should raise a `ValidationError <marshmallow.exceptions.ValidationError>` for invalid values.
Returning `False`` is no longer supported .
- Deprecate ``context`` parameter of `Schema <marshmallow.schema.Schema>` (:issue:`1826`).
Use `contextVars.ContextVar` to pass context data instead.
- `Field <marshmallow.fields.Field>`, `Mapping <marshmallow.fields.Mapping>`,
and `Number <marshmallow.fields.Number>` should no longer be used as fields within schemas.
Use their subclasses instead.

*******************

Bug fixes:

- Typing: Fix typing for `Schema.from_dict <marshmallow.schema.Schema.from_dict>` (:issue:`1653`).
Thanks :user:`SteadBytes` for reporting.

Support:

- Documentation: Various documentation cleanups, including more concise docs in the `marshmallow.fields` API reference (:issue:`2307`).
Thanks :user:`AbdealiLoKo` for reporting.

*******************

Bug fixes:

- Improve type hint formatting for ``Field``, ``Nested``, and ``Function`` fields
to resolve PyCharm warnings (:issue:`2268`).
Thanks :user:`Fares-Abubaker` for reporting and fixing.

*******************

Support:

- Document ``absolute`` parameter of ``URL`` field (:pr:`2327`).
- Documentation: Remove (outdated) minimum Python 3 minor version in
documentation and README (:pr:`2323`).

*******************

Features:

- Typing: replace "type" with specific metaclass for ``Schema`` and ``Field``.

Other changes:

- Officially support Python 3.13 (:pr:`2319`).
- Drop support for Python 3.8 (:pr:`2318`).