test: fix api options for node v20.10.0

[SethFalco]

This is the proposed solution for your comment at:

• deps: update to svgo v3.0.5 and update docs #1533 (comment)

The result of css-size changes depending on the Node.js version, so rather than testing for a specific number of bytes, this instead asserts that after processing, the result is fewer bytes.

In this scenario, on all Node.js versions except Node.js v20.10.0 (latest LTS release) it returns 67 B, but on v20.10.0 it returns 68 B instead. The new assertion instead asserts what, I assume, was the intent of the test, while passing on all Node.js versions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8511e5d) 97.56% compared to head (b2d6d8c) 97.56%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1534   +/-   ##
=======================================
  Coverage   97.56%   97.56%           
=======================================
  Files         123      123           
  Lines       10207    10207           
=======================================
  Hits         9958     9958           
  Misses        249      249           

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[ludofischer]

Thank you very much!