build(deps): bump fog-json from 1.3.0 to 1.4.0

Bumps [fog-json](https://github.com/fog/fog-json) from 1.3.0 to 1.4.0.
- [Changelog](https://github.com/fog/fog-json/blob/master/CHANGELOG.md)
- [Commits](fog/fog-json@v1.3.0...v1.4.0)

---
updated-dependencies:
- dependency-name: fog-json
  dependency-version: 1.4.0
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -99,9 +99,9 @@ GEM
       excon (~> 1.0)
       formatador (>= 0.2, < 2.0)
       mime-types
-    fog-json (1.3.0)
+    fog-json (1.4.0)
       fog-core
-      multi_json (~> 1.10)
+      json (~> 2.19)
     fog-xml (0.1.5)
       fog-core
       nokogiri (>= 1.5.11, < 2.0.0)