Bump json from 2.18.0 to 2.19.2

Bumps [json](https://github.com/ruby/json) from 2.18.0 to 2.19.2.
- [Release notes](https://github.com/ruby/json/releases)
- [Changelog](https://github.com/ruby/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.18.0...v2.19.2)

---
updated-dependencies:
- dependency-name: json
  dependency-version: 2.19.2
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -116,7 +116,7 @@ GEM
     http_parser.rb (0.8.1)
     i18n (1.14.8)
       concurrent-ruby (~> 1.0)
-    json (2.18.0)
+    json (2.19.2)
     kramdown (2.5.1)
       rexml (>= 3.3.9)
     listen (3.9.0)