Bump jsonschema from 3.0.2 to 3.1.1
Bump jsonschema from 3.0.2 to 3.1.1

Bumps [jsonschema](https://github.com/Julian/jsonschema) from 3.0.2 to 3.1.1.
- [Release notes](https://github.com/Julian/jsonschema/releases)
- [Changelog](https://github.com/Julian/jsonschema/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/Julian/jsonschema/compare/v3.0.2...v3.1.1)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
mozilla-services/kinto-dist,Kinto/kinto-dist,mozilla-services/kinto-dist,Kinto/kinto-dist