fix(package): update chalk to version 2.0.0 (#16)

Author: greenkeeper[bot]

package.json

@@ -30,7 +30,7 @@
   },
   "dependencies": {
     "axios": "^0.16.0",
-    "chalk": "^1.1.3",
+    "chalk": "^2.0.0",
     "file-exists": "^3.0.0",
     "gitmoji-data": "^1.0.0",
     "inquirer": "^3.0.2",