Bump jsonschema from 3.0.1 to 3.0.2

Bumps [jsonschema](https://github.com/Julian/jsonschema) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/Julian/jsonschema/releases)
- [Changelog](https://github.com/Julian/jsonschema/blob/master/CHANGELOG.rst)
- [Commits](python-jsonschema/jsonschema@v3.0.1...v3.0.2)

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

requirements.txt

@@ -12,7 +12,7 @@ idna==2.8
 iso8601==0.1.12
 jsonpatch==1.24
 jsonpointer==2.0
-jsonschema==3.0.1
+jsonschema==3.0.2
 kinto==13.2.2
 logging-color-formatter==1.0.2
 PasteDeploy==2.0.1