Fix all lib/ files with ESLint rules with 0 errors.

lib/util/urlutil.js

@@ -3,8 +3,11 @@ var url = require('url')
 module.exports.addParams = function(originalUrl, params) {
   var parsed = url.parse(originalUrl, true)
   parsed.search = null
+  // TODO: change to ES6 loop
   for (var key in params) {
-    parsed.query[key] = params[key]
+    if (params.dict.hasOwnProperty(key)) {
+      parsed.query[key] = params[key]
+    }
   }
   return url.format(parsed)
 }