chore(package): update chai-as-promised to version 7.1.1

Closes #65

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "babel-preset-env": "^1.2.2",
     "babel-register": "^6.24.0",
     "chai": "^3.5.0",
-    "chai-as-promised": "^6.0.0",
+    "chai-as-promised": "^7.1.1",
     "del": "^2.2.2",
     "gulp": "^3.9.1",
     "gulp-babel": "^6.1.2",