chore(package): update chalk to version 2.4.0

Closes #23

Author: greenkeeper[bot]

package.json

@@ -34,7 +34,7 @@
     "babel-preset-env": "^1.3.3",
     "babel-register": "^6.24.1",
     "chai": "3.5.0",
-    "chalk": "1.1.3",
+    "chalk": "2.4.0",
     "cheerio": "0.22.0",
     "compression": "1.6.2",
     "cross-env": "4.0.0",