fix: unicode characters

[alexander-akait]

css-selector-tokenizer parse and stringify unicode value (not only) very bad and with bugs - switch to stable value parser

[codecov-io]

Codecov Report

Merging #4 into master will decrease coverage by 0.43%.
The diff coverage is 97.22%.

@@            Coverage Diff             @@
##           master       #4      +/-   ##
==========================================
- Coverage     100%   99.56%   -0.44%     
==========================================
  Files           2        2              
  Lines         238      232       -6     
  Branches       60       65       +5     
==========================================
- Hits          238      231       -7     
- Misses          0        1       +1

Impacted Files	Coverage Δ
test.js	100% <ø> (ø)	⬆️
index.js	99.5% <97.22%> (-0.5%)	⬇️

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[codecov-io]

Codecov Report

Merging #4 into master will decrease coverage by 0.86%.
The diff coverage is 94.44%.

@@            Coverage Diff             @@
##           master       #4      +/-   ##
==========================================
- Coverage     100%   99.13%   -0.87%     
==========================================
  Files           2        2              
  Lines         238      232       -6     
  Branches       60       65       +5     
==========================================
- Hits          238      230       -8     
- Misses          0        2       +2

Impacted Files	Coverage Δ
test.js	100% <ø> (ø)	⬆️
index.js	99.01% <94.44%> (-0.99%)	⬇️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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