The build uses an approvals module from pypi

[JayBazuzi]

1. Edit version.py and approvaltests/version.py to 17.4.2
2. Run build_and_test

...
      FileNotFoundError: [Errno 2] No such file or directory: '/private/var/folders/n2/1n6t04rx0977kybzghywm8f80000gn/T/pip-install-7e8q7num/approval-utilities_e5c41254a37d40918999d78dfe6986e5/tests/approved_files/test_workflow_matrix.test_workflow_matrix_python_versions.approved.txt'
...

The local build should depend on locally-produced approvals artifacts, not approvals artifacts from Pypi.