[Pythonmac-SIG] ANN: PyObjC 4.2

[Ronald Oussoren]

I’ve just published PyObjC 4.2 on PyPI. This is primarily a bug fix release, but also introduces bindings to the BusinessChat framework introduced in macOS 10.13.4.  Those bindings are probably totally uninteresting for most users as the framework can only be used by a small subset of macOS developers. 

The full list of changes for this release:

* Add bindings to the BusinessChat framework introduced in macOS 10.13.4

* Update metadata for Xcode 9.3

* Issue #233 Fix crash in Security.AuthorizationCopyRights() wrapper

* Issue #234 Fix crash in AuthorizationExecuteWithPrivileges() wrapper

  Reported by Vangelis Koukis

* Ensure doctest can work with modules containing subclasses of NSObject

  Reported by Just van Rossum

* Issue #236 : Importing can sometimes fail in multi-threaded scenarios

  Fix by Max Bélanger

* Undeprecate treating struct wrappers as sequences. Removing this feature would
  break too much existing code, hence deprecating is not really an option. Furthermore,
  this would also break some nice idioms.


* Pull request #17: Fix python 3 issues in PyObjCTools.AppHelper and PyObjCTools.Conversion

  Fix by Max Bélanger


Regards,

  Ronald
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