Merge pull request #311 from jhmartin/dependabot/bundler/json-2.9.0

Bump json from 2.8.2 to 2.9.0

Author: jhmartin

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
       concurrent-ruby
     concurrent-ruby (1.2.2)
     jmespath (1.6.2)
-    json (2.8.2)
+    json (2.9.0)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)