- Update to 5.4.1
* Many changes, see upstream changelog
* Issue an error report if a .spec file will not be generated, but
command-line options specific to that functionality are given
* The `PyInstaller.utils.hooks.get_module_attribute` function now
returns the actual attribute value instead of its string representation.
* The matplotlib.backends hook no longer collects all available matplotlib
backends, but rather tries to auto-detect the used backend(s) by default.
* Drop support for Python 3.6.
* Make the error handing of `~PyInstaller.utils.hooks.collect_submodules`
configurable.
* Detect if an icon file (.ico or .icns) is of another image type but has
been mislabelled as a native icon type via its file suffix then either
normalise to a genuinely native image type if pillow is installed or
raise an error.
* Implement a mechanism for controlling the collection mode of modules and
packages, with granularity ranging from top-level packages to individual
sub-modules.
* Add support for setuptools-provided distutils, available since
setuptools >= 60.0.