Bump jsonpatch from 1.28 to 1.30

Bumps [jsonpatch](https://github.com/stefankoegl/python-json-patch) from 1.28 to 1.30.
- [Release notes](https://github.com/stefankoegl/python-json-patch/releases)
- [Commits](stefankoegl/python-json-patch@v1.28...v1.30)

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

requirements.txt

@@ -10,7 +10,7 @@ dockerflow==2020.10.0
 hupper==1.10.2
 idna==3.1
 iso8601==0.1.14
-jsonpatch==1.28
+jsonpatch==1.30
 jsonpointer==2.0
 jsonschema==3.2.0
 kinto==14.2.0