Add includeCredentials option.

[dlongley]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.91%. Comparing base (c214cdb) to head (be2aa3c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #195      +/-   ##
==========================================
+ Coverage   90.86%   90.91%   +0.04%     
==========================================
  Files           5        5              
  Lines        1106     1112       +6     
==========================================
+ Hits         1005     1011       +6     
  Misses        101      101              

Files with missing lines	Coverage Δ
lib/index.js	91.07% <100.00%> (+0.06%)	⬆️

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