Narrow down the system packages that we install in dev environments. The
rationale is that we get most of the Python dependencies from Poetry, so
we don't need to install them from the system as well.
The packages that we do need to install are non-Python ones, and this
commit adds some that were missing: make, python3-stdeb. Also, we
explicitly install the base Qt5 libraries, in order to get the graphics
and C++ libraries that we can't get from PyPI.
Cx-Freeze 6.13.0 limited the PATH of the build executables, making it so
Dangerzone couldn't find Docker through shutil.which().
More information on the issue is available at:
https://github.com/marcelotduarte/cx_Freeze/issues/1674
The parameterizatin features of pytest over the default unittest
will be useful to reduce test code. Furthermore, pytest is already
used by folks at FPF so there won't be any learning curve if folks
want to work on it.
Mypy was returning many errors relating to PySide2, which didn't
make much sense. This is apparently because there are missing type
hinting stubs for PySide2.
The temporary solution is to add this devel dependency.
Upstream issue: (remove dep. when solved)
- https://bugreports.qt.io/browse/PYSIDE-1675
