build(deps): bump github.com/shamaton/msgpack/v2 from 2.3.1 to 2.4.0

[dependabot]

Bumps github.com/shamaton/msgpack/v2 from 2.3.1 to 2.4.0.

Release notes

Sourced from github.com/shamaton/msgpack/v2's releases.

v2.4.0

Highlights

• New global switches to control the timezone used when decoding MessagePack Timestamp into Go’s time.Time.
• No breaking changes in v2.4.0. The default behavior remains Local.
• Heads-up for v3: default decoded time.Time will change to UTC (instant unchanged).

Added

• msgpack.SetDecodedTimeAsUTC() — forces decoded time.Time to use UTC.
• msgpack.SetDecodedTimeAsLocal() — forces decoded time.Time to use Local (mirrors current default in v2.x).

These functions allow you to preview and standardize your runtime behavior before upgrading to v3.

Why this matters

MessagePack’s Timestamp represents an instant (epoch seconds + nanoseconds) and does not carry timezone info. Historically, decoding to Local could lead to environment-dependent differences across hosts. Many distributed systems and APIs prefer UTC for predictability.

Usage

// Opt in to UTC decoding on v2.x (recommended for distributed systems/APIs)
msgpack.SetDecodedTimeAsUTC()
// Restore/keep Local decoding explicitly
msgpack.SetDecodedTimeAsLocal()

Note: v2.4.0 still defaults to Local unless you call SetDecodedTimeAsUTC().

What’s next (v3 heads-up)

In v3.0.0, the default decoded time.Time location will change from Local to UTC. The encoded/decoded instant is unchanged; only time.Time.Location() differs. If you rely on local display, you’ll be able to call msgpack.SetDecodedTimeAsLocal() to keep the old behavior.

Migration tips

• If your UI expects local time, call msgpack.SetDecodedTimeAsLocal() at startup.
• For logs/APIs/DBs, consider standardizing on UTC now via msgpack.SetDecodedTimeAsUTC() to smooth the v3 upgrade.
• Tests that assert string forms of time.Time may need to normalize to UTC or set the desired location explicitly.

Links

• Issue: #51
• PR: #52

Full Changelog: shamaton/msgpack@v2.3.1...v2.4.0

Commits

• 2dcdf8e Merge pull request #52 from shamaton/feature/time-local-utc-decode
• 44fb0bc add Announcement to README
• 84ccecf add time test cases
• a59081c add configurable timezone for decoded time.Time values
• See full diff in compare view

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