Xcode 10 fixes

[johndpope]

No description provided.

[bazscott]

Thanks for doing this @johndpope - good teamwork :)

[bazscott]

@johndpope Probably wouldn't commit this change, I just did this for my local copy :)

[johndpope]

I manually edited using github editor. should be good to go c00d7cb

[liangfenxiaodao]

May I ask when will this pull request get merged?

[RomainQuidet]

this pull request does not correct the issue on latest Xcode 10.1

[Bunn]

@RomainQuidet you can try this one: #45 I'm using on my machine since the day I sent the PR, seems to be working fine.

[RomainQuidet]

@Bunn #45 will fail too as deviceJson["availability"] as? String is not a string ... but a Bool. I tried the same on my side, it worked. I had to change availability enum to simple
enum Availability { case available case unavailable }
and the Device init method:
init(udid: String, type: String, name: String, state: String, availability: Bool)
and self.availability = availability ? .available : .unavailable

[RomainQuidet]

I can do the pull request if you want. It's working on my Mac right now.

[johndpope]

closing this from above comments.
Unless @luosheng - merges - new PR won't see light of day.