Accept arbitrary args in signal handler

[ljwoods2]

Fixes #116

Changes made in this Pull Request:

• Added "*args" and "**kwargs" to method header of signal handler so no error is raised in signal handler API calls

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.13%. Comparing base (d68ed9a) to head (f2ccf08).
⚠️ Report is 6 commits behind head on main.

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[orbeckst]

Lgtm