Update dependency negotiator to v0.6.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
negotiator	0.6.3 -> 0.6.4

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Release Notes

jshttp/negotiator (negotiator)

v0.6.4

Compare Source

• Added an option preferred encodings array (#​59) 8f58d74
• Replace deprecated String.prototype.substr() d3c7697

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.59%. Comparing base (5f0e991) to head (215afa2).
Report is 22 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #498   +/-   ##
=======================================
  Coverage   73.59%   73.59%           
=======================================
  Files          31       31           
  Lines        2030     2030           
=======================================
  Hits         1494     1494           
  Misses        465      465           
  Partials       71       71           

Flag	Coverage Δ
unittests	73.59% <ø> (ø)

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