Add changelog entry

Diego Argueta · Diego Argueta · commit 3ab115109952 · 2021-12-16T10:29:53.000-08:00
diff --git a/changelog.d/140.change.rst b/changelog.d/140.change.rst
@@ -0,0 +1,3 @@
+It is now possible to use type-variant generics in your dataclasses, such as ``Sequence`` or ``MutableSequence`` instead of ``List``, ``Mapping`` instead of ``Dict``, etc.
+
+This doesn't change any behavior by Desert or Marshmallow. Rather, the primary benefit is getting more flexibility from type checkers. For example, by using ``Mapping`` or ``MutableMapping``, users can pass ``OrderedDict`` to an attribute without MyPy complaining.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	+It is now possible to use type-variant generics in your dataclasses, such as ``Sequence`` or ``MutableSequence`` instead of ``List``, ``Mapping`` instead of ``Dict``, etc.
	`2`	`+`
	`3`	+This doesn't change any behavior by Desert or Marshmallow. Rather, the primary benefit is getting more flexibility from type checkers. For example, by using ``Mapping`` or ``MutableMapping``, users can pass ``OrderedDict`` to an attribute without MyPy complaining.