chore: update dependency fflate to v0.8.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
fflate (source)	0.8.2 → 0.8.3

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Release Notes

101arrowz/fflate (fflate)

v0.8.3

Compare Source

• Fix buffer over-read for Zip64 extra fields
• Support sync flushes (Z_SYNC_FLUSH in zlib)
  • Allows for immediate decompression of all pushed bytes
  • Enables DEFLATE stream concatenation
• Fix zip/zipSync when using cross-realm Uint8Array
• Improve Zip64 support for streamed or undersized archives
• Update performance estimates in README
• Fix typings for TypeScript v5.7+
• Reduce memory consumption after compression stream completion

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