Bump the ruby-dependencies group with 2 updates

Bumps the ruby-dependencies group with 2 updates: [excon](https://github.com/excon/excon) and [json](https://github.com/flori/json).


Updates `excon` from 0.104.0 to 0.105.0
- [Changelog](https://github.com/excon/excon/blob/master/changelog.txt)
- [Commits](excon/excon@v0.104.0...v0.105.0)

Updates `json` from 2.6.3 to 2.7.0
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.6.3...v2.7.0)

---
updated-dependencies:
- dependency-name: excon
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: ruby-dependencies
- dependency-name: json
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: ruby-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -7,7 +7,7 @@ GEM
     dead_end (4.0.0)
     diff-lcs (1.5.0)
     erubis (2.7.0)
-    excon (0.104.0)
+    excon (0.105.0)
     heroics (0.1.2)
       erubis (~> 2.0)
       excon
@@ -20,7 +20,7 @@ GEM
       rrrretry (~> 1)
       thor (~> 1)
       threaded (~> 0)
-    json (2.6.3)
+    json (2.7.0)
     moneta (1.0.0)
     multi_json (1.15.0)
     parallel (1.23.0)