chore(package): update npm-run-all to version 1.8.0 (#59)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -58,7 +58,7 @@
     "glob": "7.0.3",
     "html-webpack-plugin": "2.16.0",
     "mocha": "2.4.5",
-    "npm-run-all": "1.7.0",
+    "npm-run-all": "1.8.0",
     "nyc": "6.4.0",
     "path-here": "1.1.0",
     "path-parse": "1.0.5",