In preparation for the 0.13.0 release, we are bumping up the minimum Qt required version to 5.15/6.2+ (from 5.12+/6.1+).

TODO

• Change Qt version check to a warning from a raised exception
• Undo removal of code that was needed for Qt 5.12 support (can talk about removing after the next release)
• Consider emitting warnings on if-checks for newer Qt versions.
• Remove lazyGetattr in Qt/__init__.py as we no longer support accessing QtWidgets via QtGui

Files that need updates

Confirm the following files have been either updated or there has been a determination that no update is needed.

• README.md
• setup.py N/A
• tox.ini
• .github/workflows/main.yml and associated requirements.txt and conda environemt.yml files
• pyproject.toml N/A
• binder/requirements.txt N/A