lint: apply standard 11 style

Author: dougwilson

package.json

@@ -18,11 +18,11 @@
     "vary": "~1.1.2"
   },
   "devDependencies": {
-    "eslint": "3.19.0",
-    "eslint-config-standard": "10.2.1",
+    "eslint": "4.18.0",
+    "eslint-config-standard": "11.0.0",
     "eslint-plugin-import": "2.8.0",
     "eslint-plugin-markdown": "1.0.0-beta.6",
-    "eslint-plugin-node": "5.2.1",
+    "eslint-plugin-node": "6.0.0",
     "eslint-plugin-promise": "3.6.0",
     "eslint-plugin-standard": "3.0.1",
     "istanbul": "0.4.5",