chore(package): update nyc to version 12.0.2

Closes #74

Author: greenkeeper[bot]

package.json

@@ -68,7 +68,7 @@
     "husky": "^0.14.3",
     "immutable": "^3.8.1",
     "jsdom": "^11.1.0",
-    "nyc": "^11.0.3",
+    "nyc": "^12.0.2",
     "prop-types": "^15.5.10",
     "react": "^15.6.1",
     "rimraf": "^2.5.4",