Merge pull request #1727 from cloudfoundry/dependabot/bundler/assets/service_broker/develop/json-2.15.2

build(deps): bump json from 2.15.1 to 2.15.2 in /assets/service_broker

Author: jochenehret

assets/service_broker/Gemfile.lock

@@ -3,7 +3,7 @@ GEM
   specs:
     base64 (0.3.0)
     diff-lcs (1.6.2)
-    json (2.15.1)
+    json (2.15.2)
     logger (1.7.0)
     mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)