chore(package): update fs-extra to version 0.29.0 (#63)

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -36,7 +36,7 @@
     "cheerio": "0.20.0",
     "compare-urls": "^1.0.0",
     "css-url-parser": "^1.0.0",
-    "fs-extra": "^0.28.0",
+    "fs-extra": "^0.29.0",
     "lodash": "^4.11.1",
     "request": "^2.42.0",
     "srcset": "^1.0.0"