Fix format.ProcessJSONs flatten directive
Fix format.ProcessJSONs flatten directive

without this format.ProcessJSON would fail to flatten keys containing json objects, because json objects must be cast to map[string]interface{} instead of map[interface{}]interface{}

trivago/gollum,mre/gollum,luqasz/gollum,relud/gollum,luqasz/gollum,trivago/gollum,mre/gollum,relud/gollum