Merge pull request #9 from Mastercard/dependabot/bundler/ruby/json-2.3.1

Bump json from 2.2.0 to 2.3.1 in /ruby

Author: jaaufauvre

ruby/Gemfile.lock

@@ -16,7 +16,7 @@ GEM
       ffi (>= 1.3.0)
     ffi (1.11.1)
     jaro_winkler (1.5.3)
-    json (2.2.0)
+    json (2.3.1)
     method_source (0.9.2)
     parallel (1.17.0)
     parser (2.6.3.0)