chore: release 3.1.0

[rokt-releases]

Release 3.1.0

These files should have changed during the release, if they didn't then this is likely an issue and should be investigated:

• package.json
• CHANGELOG.md

Added

• Support mParticle Apple SDK 9.2 (#324)

[cursor]

PR Summary

Low Risk
Low risk release bookkeeping only: updates version metadata and changelog entries without touching runtime code paths.

Overview
Cuts release 3.1.0 by bumping the version in package.json and VERSION.

Updates CHANGELOG.md with a new 3.1.0 section (Apple SDK 9.2 support) and adjusts the [unreleased]/[3.1.0] compare links accordingly.

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