chore(package): update standard to version 13.0.2

Closes #4

Author: greenkeeper[bot]

package.json

@@ -18,7 +18,7 @@
   "devDependencies": {
     "codecov": "^3.2.0",
     "nyc": "^13.3.0",
-    "standard": "^12.0.1",
+    "standard": "^13.0.2",
     "tap": "^12.6.1"
   },
   "dependencies": {},