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

Closes #51

Author: greenkeeper[bot]

package.json

@@ -37,7 +37,7 @@
     "bluebird": "^3.4.7",
     "browserify": "^14.1.0",
     "chai": "^3.5.0",
-    "chai-as-promised": "^6.0.0",
+    "chai-as-promised": "^7.1.1",
     "es3ify": "^0.2.2",
     "istanbul": "^0.4.5",
     "jshint": "^2.9.4",