added safe flat

Author: Adnan Rahic

lib/index.js

@@ -7,7 +7,7 @@ var winston = require('winston')
 const winstonCompat = require('winston-compat')
 var _dirname = require('path').dirname
 var LogseneJS = require('logsene-js')
-var flat = require('flat')
+const { flatten } = require('safe-flat')
 
 var Logsene = function (options) {
   options = options || {}
@@ -199,7 +199,7 @@ Logsene.prototype.log = function (meta, callback) {
     })
     console.log(output)
   }
-  this.logger.log(level, msg, flat(metaData, this.flatOptions), callback)
+  this.logger.log(level, msg, flatten(metaData, this.flatOptions), callback)
 }
 
 Logsene.prototype.clearLogs = function () {