ANN: SIP v6.0.2, PyQt-builder v1.9.0, PyQt v5.15.3 and PyQt v6.0.2 Released

[Phil Thompson]

A few new releases...

SIP v6.0.2
A minor bug fix release.

PyQt-builder v1.9.0
A minor feature release.

PyQt v5.15.3
This is a bug fix release. The wheels have been restructured so that the 
Qt libraries are in separate wheels (as they are with PyQt6). Also the 
QtNetworkAuth bindings are now in a separate PyQtNetworkAuth project.

PyQt v6.0.2
This is a bug fix release.

Phil