feat(packages/sticky-jest): add polyfill for fetch

[thedoublejay]

What this PR does / why we need it:

To prevent fetch warnings on jest: reduxjs/redux-toolkit#2084

Which issue(s) does this PR fixes?:

Fixes #

Additional comments?:

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[codecov]

Codecov Report

Merging #95 (7139c0e) into main (1070dc8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #95   +/-   ##
=======================================
  Coverage   67.39%   67.39%           
=======================================
  Files           5        5           
  Lines          92       92           
  Branches        3        3           
=======================================
  Hits           62       62           
  Misses         30       30           

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