fix!: return ArrayBuffer-backed arrays

[achingbrain]

Since microsoft/TypeScript#59417 Uint8Arrays backed by ArrayBuffer are incompatible with those backed with SharedArrayBuffer so be explicit about the types returned.

BREAKING CHANGE: where Uint8Array was returned, now Uint8Array<ArrayBuffer>is returned instead

[codecov]

Codecov Report

❌ Patch coverage is 73.33333% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.34%. Comparing base (385701f) to head (ad3f364).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/util/as-uint8array.node.ts	50.00%	4 Missing ⚠️
src/util/as-uint8array.ts	66.66%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #98      +/-   ##
==========================================
- Coverage   99.05%   95.34%   -3.71%     
==========================================
  Files          24       16       -8     
  Lines         633      344     -289     
  Branches      117       71      -46     
==========================================
- Hits          627      328     -299     
- Misses          6       16      +10     

Flag	Coverage Δ
chrome	95.41% <77.77%> (-1.98%)	⬇️
node	92.79% <71.42%> (-5.10%)	⬇️

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[github-actions]

🎉 This PR is included in version 6.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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