chore(package): update nsp to version 2.7.0

Closes #39

Author: greenkeeper[bot]

package.json

@@ -80,7 +80,7 @@
     "mocha": "3.2.0",
     "np": "2.10.1",
     "npm-run-all": "3.1.2",
-    "nsp": "2.6.2",
+    "nsp": "2.7.0",
     "nyc": "8.4.0",
     "phantomjs-prebuilt": "2.1.13",
     "rimraf": "2.5.4",