Bump standard devDependency from 14.x to 16.x

Ref Level/community#98

Author: vweevers

package.json

@@ -24,7 +24,7 @@
     "dependency-check": "^3.3.0",
     "hallmark": "^3.1.0",
     "nyc": "^15.0.0",
-    "standard": "^14.0.0",
+    "standard": "^16.0.3",
     "tape": "^5.0.1"
   },
   "hallmark": {