addng altgraph dependency for PyInstaller per buskill build logs

 * https://github.com/BusKill/buskill-app/runs/3277514702?check_suite_focus=true

2021-08-09T06:34:11.7847480Z + /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/buskill-app/buskill-app/build/deps/ build/deps/PyInstaller-3.6.tar.gz
2021-08-09T06:34:12.2330450Z Looking in links: file:///Users/runner/work/buskill-app/buskill-app/build/deps/
2021-08-09T06:34:12.2356450Z Processing ./build/deps/PyInstaller-3.6.tar.gz
2021-08-09T06:34:13.0023770Z   Installing build dependencies: started
2021-08-09T06:34:14.6842110Z   Installing build dependencies: finished with status 'done'
2021-08-09T06:34:14.6851300Z   Getting requirements to build wheel: started
2021-08-09T06:34:15.1569400Z   Getting requirements to build wheel: finished with status 'done'
2021-08-09T06:34:15.1616360Z     Preparing wheel metadata: started
2021-08-09T06:34:15.5807660Z     Preparing wheel metadata: finished with status 'done'
2021-08-09T06:34:15.6073970Z Processing ./build/deps/altgraph-0.17-py2.py3-none-any.whl
2021-08-09T06:34:15.6295390Z Processing ./build/deps/setuptools-49.1.0-py3-none-any.whl
2021-08-09T06:34:15.7627530Z Processing ./build/deps/macholib-1.14-py2.py3-none-any.whl
2021-08-09T06:34:15.7782030Z Building wheels for collected packages: PyInstaller
2021-08-09T06:34:15.7795860Z   Building wheel for PyInstaller (PEP 517): started
2021-08-09T06:34:17.4414590Z   Building wheel for PyInstaller (PEP 517): finished with status 'done'
2021-08-09T06:34:17.4525370Z   Created wheel for PyInstaller: filename=PyInstaller-3.6-py3-none-any.whl size=2926556 sha256=edef18f3339d93ab6e755e8c8504bb003f82535de85464446e48a2df559a609c
2021-08-09T06:34:17.4527860Z   Stored in directory: /Users/runner/work/buskill-app/buskill-app/build/deps/wheels/88/d7/54/96b9ab9a8d7b5872f13730179ec420791261f9a5ee1c633ffa
2021-08-09T06:34:17.4531370Z Successfully built PyInstaller
2021-08-09T06:34:17.5553960Z Installing collected packages: altgraph, setuptools, macholib, PyInstaller