chore(package): update nyc to version 13.3.0

Closes #16

Author: greenkeeper[bot]

package.json

@@ -11,7 +11,7 @@
     "babel-cli": "^6.23.0",
     "babel-preset-es2015": "^6.22.0",
     "babel-preset-react": "^6.23.0",
-    "nyc": "^11.0.1",
+    "nyc": "^13.3.0",
     "react": "^15.4.2",
     "react-addons-test-utils": "^15.4.2",
     "react-dom": "^15.4.2",