Bump marshmallow from 3.2.0 to 3.2.1 (#994)

Bumps [marshmallow](https://github.com/marshmallow-code/marshmallow) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/marshmallow-code/marshmallow/releases)
- [Changelog](https://github.com/marshmallow-code/marshmallow/blob/dev/CHANGELOG.rst)
- [Commits](https://github.com/marshmallow-code/marshmallow/compare/3.2.0...3.2.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

http_service/requirements.txt

@@ -5,6 +5,6 @@ Flask==1.1.1
 flask-apispec==0.8.3
 flask-cors==3.0.8
 gunicorn==19.9.0
-marshmallow==3.2.0
+marshmallow==3.2.1
 rq==1.1.0
 rq-dashboard==0.5.3