chore(deps): Update npm deps, add Node 20 to CI

[dpogue]

Platforms affected

All

Motivation and Context

Update some dependencies.

Description

• Add node 20 to CI
• Update GitHub Actions dependencies
• Rebuild package-lock to resolve npm audit warnings
• Replace fs-extra dependency with Node core fs API

Testing

Unit tests pass.

Checklist

• I've run the tests to see all new and existing tests pass

[erisu]

LGTM

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.70%. Comparing base (3280edc) to head (d1c9c4c).
Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
index.js	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #86      +/-   ##
==========================================
+ Coverage   89.55%   89.70%   +0.15%     
==========================================
  Files           1        1              
  Lines          67       68       +1     
==========================================
+ Hits           60       61       +1     
  Misses          7        7              

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[erisu]

LGTM