Add ability to set user defaults suite

[shaundon]

Hi,

Here's a small PR to add a function for setting which UserDefaults suite to use. I'm using it in my own app to make use of Zephyr while using App Groups.

Example usage:

if let suite = UserDefaults(suiteName: "group.com.example.app-name") {
    Zephyr.setUserDefaultsSuite(to: suite)
}

I'm not sure if you accept external PRs – if this isn't something you're looking for then no worries. I'm also happy to update this PR to document it in the readme, but I figured I'd wait to see what you think before doing that.

[ArtSabintsev]

hey, feel free to update the docs and I'll merge this in. Thanks for the contribution!

[danielkramer]

I'm interested in this update as well!

[ArtSabintsev]

Sounds good - please update the docs in this PR and I'll happily merge it if you can confirm it works.

[shaundon]

Sorry for the delay, I went on holiday right after making the initial PR. I've updated the readme now.

[shaundon]

if you can confirm it works

I'm using it in production in my app SalaryPig and all seems to work well.

[ArtSabintsev]

Looks good! Will merge.

[danielkramer]

Thanks! Just to add, I've been using the update in an app I'm developing.. been using for a few weeks and no issues

[ArtSabintsev]

Great! I'll push via cocoa pods soon.

[ArtSabintsev]

Just released as v3.8.0

Closing this issue