chore(package): update benchmark to version 2.1.3 (#509)

package.json

@@ -80,7 +80,7 @@
   "devDependencies": {
     "babel-eslint": "7.1.1",
     "babel-preset-env": "1.1.4",
-    "benchmark": "2.1.2",
+    "benchmark": "2.1.3",
     "coveralls": "2.11.15",
     "gulp": "3.9.1",
     "gulp-babel": "6.1.2",