constricting marshmallow to v3 and higher:
@@ -36,7 +36,7 @@ setup(
# long as they have a version of pyfoobar equal to or greater than 1.x
# and less than 2.x installed.
'flask>=1.0.2',
- 'marshmallow>=2.15.3,<=3.6',
+ 'marshmallow>=3.0,<=3.6',
'marshmallow-annotations'
],
python_requires=">=3.6",
