chore(package): update eslint-plugin-standard to version 4.0.0 (#290)

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "eslint-plugin-import": "^2.13.0",
     "eslint-plugin-node": "^7.0.1",
     "eslint-plugin-promise": "^4.0.0",
-    "eslint-plugin-standard": "^3.1.0",
+    "eslint-plugin-standard": "^4.0.0",
     "exec-extra": "^2.4.0",
     "goo.gl": "^0.1.4",
     "greenkeeper-lockfile": "^1.15.1",