Build fails: `isUnitTesting` only available in DEBUG mode

[collinhundley]

In AppleUtils.swift, line 253:

if isUnitTesting == false {

isUnitTesting is defined in Utils.swift, but only in DEBUG mode. So, the build fails for all non-debug builds.

Bug introduced in v1.5.6
Platform: macOS

[bsneed]

Thanks for spotting that @collinhundley ! Ugh, userAgent has been the bane of my existence lately. :( I'll get this fixed in just a minute and do another release.

[collinhundley]

@bsneed thanks!