Allow topic_tools/relay to exit with -6

[christophfroehlich]

fixes #76

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.89%. Comparing base (f496102) to head (d02a8a9).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #105   +/-   ##
=======================================
  Coverage   77.89%   77.89%           
=======================================
  Files           6        6           
  Lines         457      457           
  Branches       46       46           
=======================================
  Hits          356      356           
  Misses         70       70           
  Partials       31       31           

Flag	Coverage Δ
unittests	77.89% <ø> (ø)

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[MarqRazz]

I tried to apply a fix upstream. Do you want to wait and see if that fixes it or merge this?

[christophfroehlich]

this is great, thanks for having a look. let's see how fast you'll get a response there and wait with this PR for now