Bump yajl-ruby from 1.3.1 to 1.4.2

Bumps [yajl-ruby](https://github.com/brianmario/yajl-ruby) from 1.3.1 to 1.4.2.
- [Release notes](https://github.com/brianmario/yajl-ruby/releases)
- [Changelog](https://github.com/brianmario/yajl-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brianmario/yajl-ruby/commits)

---
updated-dependencies:
- dependency-name: yajl-ruby
  dependency-type: indirect
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -37,7 +37,7 @@ GEM
     rufus-lru (1.1.0)
     treetop (1.6.8)
       polyglot (~> 0.3)
-    yajl-ruby (1.3.1)
+    yajl-ruby (1.4.2)
 
 PLATFORMS
   ruby