chore(package): update chai-as-promised to version 7.1.0

Closes #11

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
-    "chai-as-promised": "^6.0.0",
+    "chai-as-promised": "^7.1.0",
     "customize": "^2.0.1",
     "eslint": "^3.19.0",
     "eslint-config-standard": "^10.2.0",