Previews of next PyQt6, PyQt5 and SIP Releases Available

[Phil Thompson]

Previews of PyQt6 v6.4.2, PyQt5 v5.15.9 and SIP v6.7.7 are available at 
the local PyPI server. These are all minor bug-fix releases that fix 
regressions in the previous releases. Specifically, pylupdate6 should be 
fixed and the Qt module of PyQt5 should be fully populated.

Please test.

Phil