[QGIS-Developer] Overview of QGIS 3 and (Py)Qt versions

[Sander Schaminee]

Thanks Greg.

To elaborate, I am actually interested in one thing only: 
I am looking for the QGIS version at which PyQt 5.6 (or higher) was introduced and/or the QGIS version at which PyQt 5.5 (or lower) could no longer be used.
The reason is that there's a breaking change in the PyQt API from 5.6 on.

If this question cannot be answered due to the complex nature of dependency management in QGIS/OSGeo4W, then that's also an answer.
In that case, I will have to do a dual implementation.

Thanks,
Sander