Bump json from 2.5.1 to 2.6.1

Bumps [json](https://github.com/flori/json) from 2.5.1 to 2.6.1.
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](ruby/json@v2.5.1...v2.6.1)

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

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

Author: dependabot[bot]

Gemfile

@@ -4,7 +4,7 @@ gem 'bourbon', '~> 4.2.1'
 gem 'jekyll-babel', '~>1.1.0'
 gem 'jekyll-paginate', '~>1.1.0'
 gem 'jekyll', '~>3.9.0'
-gem 'json', '~> 2.3'
+gem 'json', '~> 2.6'
 gem 'neat', '~> 1.7.1'
 gem 'nokogiri', '~> 1.13.6'
 gem 'rouge', '~> 2.2.1'

Gemfile.lock

@@ -69,7 +69,7 @@ GEM
       sass (~> 3.4)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.5.1)
+    json (2.6.1)
     kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -130,7 +130,7 @@ DEPENDENCIES
   jekyll-babel (~> 1.1.0)
   jekyll-github-metadata (~> 2.14)
   jekyll-paginate (~> 1.1.0)
-  json (~> 2.3)
+  json (~> 2.6)
   kramdown (~> 2.3.1)
   kramdown-parser-gfm (~> 1.1.0)
   neat (~> 1.7.1)