feat(publish): ability to publish applications using Xcode 11

[Fatme]

As Application Loader is no longer included in Xcode 11, CLI is not able to find the path to itmsTransporter and throws an error. However, itmsTransporter app is already part of ContentDeliveryServices.framework which is part of SharedFrameworks which are included in Xcode 11 itself. So this PR returns the correct path to itmsTransporter app based on xcode's version.
Also this PR checks first if the path to itmsTransporter exists and after that builds the application.

Currently getXcodeVersion always returns { major: null, minor: null, patch: null }. This method uses internally sysInfo.getXcodeVersion(). On the other side, sysInfo.getXcodeVersion() returns the xocde's version in format major.minor.patch - for example 10.3.4. After getting the result of sysInfo.getXcodeVersion(), NativeScript CLI matches the received output with /Xcode (.*)/ regex. As the received output doesn't contain Xcode, the match always returns null and as result getXcodeVersion() always returns { major: null, minor: null, patch: null }.

Rel to: #4908

PR Checklist

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What is the current behavior?

What is the new behavior?

Fixes/Implements/Closes #[Issue Number].