fix: modernize

[mgabeler-lee-6rs]

• fix: use modern nodejs
• fix: switch to internal source map support
• fix: update other deps to match usage elsewhere
• fix: update dev tooling
• fix: update code, lockfile
• fix: update mocha

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 0.00%. Comparing base (8b32952) to head (31c91e4).
Report is 12 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #166   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files          1       1           
  Lines          1       1           
=====================================
  Misses         1       1           

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