Merge pull request #26 from ruby-grape/dependabot/bundler/json-2.3.0

Bump json from 2.2.0 to 2.3.0

Author: dblock

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
       concurrent-ruby (~> 1.0)
     ice_nine (0.11.2)
     jaro_winkler (1.5.4)
-    json (2.2.0)
+    json (2.3.0)
     listen (3.2.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)