freecad: missing dependency python3-pyqt5

[DarkTrick]

Steps to reproduce:
======================
- `sudo apt-get install freecad`
- freecad
-
ACTUAL:
During initialization the error No module named 'PyQt5' occurred in /usr/share/freecad/Mod/Plot/InitGui.py
Please look into the log file for further information

EXPECTED:
running app

Workaround
===========
run `sudo apt-get install python3-pyqt5`

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: freecad 0.18.4+dfsg2-1ubuntu4
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Mon Jul 27 14:05:09 2020
PackageArchitecture: all
SourcePackage: freecad
UpgradeStatus: Upgraded to focal on 2020-07-24 (2 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.