Merge pull request #60 from mrsteele/greenkeeper/standard-13.0.1

Update standard to the latest version 🚀

Author: mrsteele

package.json

@@ -52,7 +52,7 @@
     "mocha": "^5.0.0",
     "nyc": "^14.1.0",
     "rimraf": "^3.0.0",
-    "standard": "^12.0.0"
+    "standard": "^13.0.1"
   },
   "files": [
     "dist",

src/json-truncate.js

@@ -39,7 +39,7 @@ const truncate = (obj, options = {}, curDepth = 0) => {
       return newArr
     } else {
       const newObj = {}
-      for (let key in obj) {
+      for (const key in obj) {
         if (isFlat(obj[key])) {
           newObj[key] = obj[key]
         } else {