refactor(es): use wtf8

[CPunisher]

Description:

TODO

Related issue (if exists):

TODO

[changeset-bot]

⚠️ No Changeset found

Latest commit: acf8ffe

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[codspeed-hq]

CodSpeed Performance Report

Merging #11085 will degrade performances by 2.48%

_{Comparing CPunisher:09-11-fix/lone-surrogate (acf8ffe) with main (d4396c1)}

Summary

❌ 8 regressions
✅ 132 untouched

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	es/lexer/angular	10.1 ms	10.3 ms	-2.07%
❌	es/lexer/backbone	1.4 ms	1.5 ms	-2.29%
❌	es/lexer/jquery	7.7 ms	7.9 ms	-2.39%
❌	es/lexer/jquery mobile	11.7 ms	11.9 ms	-2.14%
❌	es/lexer/mootools	6.1 ms	6.3 ms	-2.25%
❌	es/lexer/typescript	184.3 ms	188.8 ms	-2.35%
❌	es/lexer/underscore	1.2 ms	1.2 ms	-2.48%
❌	es/lexer/yui	6.2 ms	6.3 ms	-2.04%