Update dependency checks workflows

[gsteel]

Replace previous require-checker workflow with one that also looks for unused deps

[codecov]

Codecov Report

Merging #23 (d97e284) into main (977d21d) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff             @@
##                main       #23   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity        66        66           
===========================================
  Files             13        13           
  Lines            233       233           
===========================================
  Hits             233       233           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 977d21d...d97e284. Read the comment docs.