Bump json from 2.7.1 to 2.7.2 (#920)

Bumps [json](https://github.com/flori/json) from 2.7.1 to 2.7.2.
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](flori/json@v2.7.1...v2.7.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -43,7 +43,7 @@ GEM
     httparty (0.21.0)
       mini_mime (>= 1.0.0)
       multi_xml (>= 0.5.2)
-    json (2.7.1)
+    json (2.7.2)
     method_source (1.0.0)
     mini_mime (1.1.2)
     mqtt (0.6.0)