chore(package): update eslint-plugin-promise to version 4.0.1

Closes #11

Author: greenkeeper[bot]

package.json

@@ -36,7 +36,7 @@
     "eslint-config-standard": "^10.2.1",
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-node": "^5.2.0",
-    "eslint-plugin-promise": "^3.6.0",
+    "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^3.0.1",
     "minimist": "^1.2.0",
     "nodemon": "^1.12.1"