grapheme: rename countGrapheme() to countGraphemes()

[cometkim]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 3da143e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
unicode-segmenter	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.65%. Comparing base (be49399) to head (3da143e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #65   +/-   ##
=======================================
  Coverage   99.65%   99.65%           
=======================================
  Files          18       18           
  Lines        2921     2928    +7     
=======================================
+ Hits         2911     2918    +7     
  Misses         10       10           

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