Update dependency com.squareup.okio:okio to v3.18.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
com.squareup.okio:okio	3.16.2 → 3.18.2

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Release Notes

lysine-dev/okio (com.squareup.okio:okio)

v3.18.2

2026-09-04

• Fix: Don't change behavior of base64-encoding. We introduced a bug in Okio 3.18.1 that caused
  base64 strings to be encoded without padding, even though the previous and expected behavior is
  to encode such strings with padding (= characters). The bug impacts callers who compiled
  against Okio releases < 3.18.0, and executed on Okio releases >= 3.18.

v3.18.1

2026-07-28

• Fix: Restore binary-compatibility with Okio 3.17.x for Kotlin/Native users. When we introduced
  the new base64() function, we inadvertently changed the binary signature! Ugh! This is now
  fixed and we've automated binary-compatibility checking for Kotlin/Native going forward.

v3.18.0

2026-07-21

• Fix: Use wide character APIs to better support of non-UTF-8 filesystems on Windows.
• Fix: Don't crash in AssetFileSystem.exists() when the underlying storage throws a
  FileNotFoundException.
• Fix: Load WASI paths relative to their preopen. The platform behavior recently changed in
  NodeJS, causing our WasiFileSystem to be unable to access files!
• New: Optionally ignore whitespace when decoding hexadecimal.
• New: Optionally omit padding when encoding Base64.
• New: BufferedSource.readUInt(), BufferedSink.writeUInt(), and similar functions for UByte,
  UShort and ULong. Also add support for unsigned and little-endian.
• New: BufferedSink.utf8Appendable(). Use this to adapt an Okio sink to an Appendable.
• New: Source.limit() returns a wrapped source with a strict limit on how many bytes are
  returned.
• New: ByteString.equals(other, constantTime) for subtle defense against timing attacks.

v3.17.0

2026-03-11

• New: Adjust down the Kotlin stdlib dependency to [Kotlin 2.1.21][kotlin_2_1_21]. Okio is built
  with an up-to-date Kotlin compiler (2.2.21), but depends on an older kotlin-stdlib. We're doing
  this so you can update Okio and Kotlin independently.

• Fix: Return the correct timestamp in FileMetadata.createdAtMillis on Kotlin/Native on UNIX
  platforms. We were incorrectly using the POSIX ctime (change time) instead of the
  birthtime. With this fix Okio now prefers statx() over stat() on native platforms. This
  API first appeared in Linux in 4.11 (2017) and Android in API 30 (2020).

v3.16.4

2025-11-17

• Fix: Don't delay triggering timeouts. In 3.16.0 we introduced a regression that caused timeouts
  to fire later than they were supposed to.

v3.16.3

2025-11-14

This release is the same as 3.16.2. We forgot to cherry-pick a commit before we released!

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