chore: release 3.1.5

[rokt-releases]

Release 3.1.5

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

Changed

• Bump mParticle core/rokt-kit floor to 5.79.2 (carries roktsdk 4.14.5 deferred-init fix) (#344)
• Add opt-in deferred-init edge-case example (Android) (#341)
• Add iOS Integration Style Unit Tests (#338)

[cursor]

PR Summary

Low Risk
Version and changelog-only release metadata; no application or native bridge code changes in this diff.

Overview
Release 3.1.5 — bumps the published package version from 3.1.4 to 3.1.5 in package.json and VERSION, and records the release in CHANGELOG.md.

The new 3.1.5 section documents shipped work from prior PRs: Android mParticle core/rokt-kit floor 5.79.2 (roktsdk deferred-init fix), an Android deferred-init example, and iOS integration-style unit tests. Changelog compare links are updated so Unreleased tracks 3.1.5...HEAD.

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