Bump pyqt5 from 5.12.2 to 5.12.3
Bump pyqt5 from 5.12.2 to 5.12.3

Bumps [pyqt5](https://www.riverbankcomputing.com/software/pyqt/) from 5.12.2 to 5.12.3.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
fa7ad/xopen-file