adding macholib per build output

2021-08-09T06:59:31.7692280Z + /usr/local/Cellar/python/3.7.8/bin/pip3 install --ignore-installed --upgrade --cache-dir build/deps/ --no-index --find-links file:///Users/runner/work/cross-platform-python-gui/cross-platform-python-gui/build/deps/ build/deps/PyInstaller-3.6.tar.gz
2021-08-09T06:59:32.3381180Z Looking in links: file:///Users/runner/work/cross-platform-python-gui/cross-platform-python-gui/build/deps/
2021-08-09T06:59:32.3453150Z Processing ./build/deps/PyInstaller-3.6.tar.gz
2021-08-09T06:59:33.2174220Z   Installing build dependencies: started
2021-08-09T06:59:34.6550690Z   Installing build dependencies: finished with status 'done'
2021-08-09T06:59:34.6558920Z   Getting requirements to build wheel: started
2021-08-09T06:59:35.0948040Z   Getting requirements to build wheel: finished with status 'done'
2021-08-09T06:59:35.0988370Z     Preparing wheel metadata: started
2021-08-09T06:59:35.5443340Z     Preparing wheel metadata: finished with status 'done'
2021-08-09T06:59:35.5674230Z Processing ./build/deps/setuptools-49.1.0-py3-none-any.whl
2021-08-09T06:59:35.6809380Z ERROR: Could not find a version that satisfies the requirement macholib>=1.8 (from PyInstaller==3.6) (from versions: none)
2021-08-09T06:59:35.9023730Z ERROR: No matching distribution found for macholib>=1.8 (from PyInstaller==3.6)

Author: maltfield