Update Standard to latest version

Author: EvanHahn

package.json

@@ -43,7 +43,7 @@
   "devDependencies": {
     "mocha": "^3.2.0",
     "sinon": "^1.17.7",
-    "standard": "^8.6.0"
+    "standard": "^9.0.1"
   },
   "scripts": {
     "pretest": "standard",