Bump json-fix from 0.5.0 to 0.5.1 in /stix_shifter

Bumps [json-fix](https://github.com/jeff-hykin/json_fix) from 0.5.0 to 0.5.1.
- [Release notes](https://github.com/jeff-hykin/json_fix/releases)
- [Commits](jeff-hykin/json_fix@0.5.0...0.5.1)

---
updated-dependencies:
- dependency-name: json-fix
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

stix_shifter/requirements.txt

@@ -10,6 +10,6 @@ stix2-patterns==1.3.2
 stix2-validator==3.0.2
 xmltodict==0.13.0
 jsonmerge==1.9.0
-json-fix==0.5.0
+json-fix==0.5.1
 colorlog==6.7.0
 stix2-matcher==3.0.0