chore(package): update nwb to version 0.24.4

Closes #27

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "eslint-plugin-react": "7.7.0",
     "husky": "0.14.3",
     "lint-staged": "7.0.0",
-    "nwb": "0.21.x",
+    "nwb": "~0.24.4",
     "nwb-sass": "0.8.4",
     "prettier": "1.11.1",
     "react-styleguidist": "6.2.7",