Hi,
I just uploaded PyObjC 4.0.1 to PyPI. This is a minor update to PyObjC 4.0, the changelog for this release is included below
Version 4.0.1
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* Issue #213: Fix signature for ```-[NSObject forwardInvocation:]```
Reported by user "pyrocat"
* Updated metadata for Xcode 9.1
* Changes to PyObjCTools.TestSupport to be able to include/exclude tests
based on the minor release of macOS.
* Some tweaks to fix test failures when running on OSX 10.5, 10.6, 10.9.
Ronald
