importing pyepr into metal during CI on Metal is failing.

[priti-ashvin-shah-ibm]

When metal is using the new tag for pip, CI fails on Metal.
https://github.com/Qiskit/qiskit-metal/runs/6617275435?check_suite_focus=true

In vscode, one can see the error which would happen when imported using pip

This is from https://www.geeksforgeeks.org/default-arguments-in-python/

@nikosavola , would you like to update the syntax, or I will try to do it tomorrow and have you be the reviewer?

[nikosavola]

You can update the syntax 👍

[nikosavola]

Should this issue be closed as of #116 ?