Update fs-extra version to latest

[overlookmotel]

fs-extra used by this module is currently v0.30.0. This is now well behind - current is v2.1.2.

Need to update the dependency, but problem is that it needs checking first if any new methods have been added that need to be promisified / any sync methods that need to be excepted from promisification.

@CyberiumShadow, @andyhu, @rifler, @ReFruity you all expressed interest in the update in PR #21. Would any of you have any time to investigate.

I'm really keen to get this done, but completely tied up and not sure when I'll get to it myself.

[CyberiumShadow]

@overlookmotel Looking into it atm.

[CyberiumShadow]

@overlookmotel afaik, nothing needs to be added apart from moveSync() jprichardson/node-fs-extra#309 and jprichardson/node-fs-extra#381

walk() and walkSync() are gone from fs-extra

Other than that, that should be it

[overlookmotel]

@CyberiumShadow Great! Thanks for looking into that. I'll release a new version with latest fs-extra shortly.

[overlookmotel]

Updated fs-extra to latest in v1.0.0, just released. It is done!

[CyberiumShadow]

\o/