Upgrade Signalhound driver to conform to our standard

[jenshnielsen]

[codecov[bot]]

Codecov Report

Merging #4483 (631f19b) into master (631f19b) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 631f19b differs from pull request most recent head e4381ad. Consider uploading reports for the commit e4381ad to get more accurate results

@@           Coverage Diff           @@
##           master    #4483   +/-   ##
=======================================
  Coverage   68.02%   68.02%           
=======================================
  Files         295      295           
  Lines       31405    31405           
=======================================
  Hits        21363    21363           
  Misses      10042    10042           

[jenshnielsen]

bors merge

[bors[bot]]

Build succeeded:

• builddocs (ubuntu-latest, 3.10)
• builddocs (ubuntu-latest, 3.9)
• builddocs (windows-latest, 3.7)
• pytestmin (ubuntu-latest, 3.7)
• pytestmypy (ubuntu-latest, 3.10)
• pytestmypy (ubuntu-latest, 3.7)
• pytestmypy (ubuntu-latest, 3.8)
• pytestmypy (ubuntu-latest, 3.9)
• pytestmypy (windows-latest, 3.10)
• pytestnonlocal (3.7)