chore: Prepare release 1.1.2

[mparticle-automation]

Preparing for release 1.1.2

• Updated pubspec.yaml to new version
• Updated CHANGELOG.md
• Updated VERSION file
• Ran a dry-run publish

[cursor]

PR Summary

Low Risk
Low risk release prep: only versioning/changelog metadata and lockfile updates from a publish dry-run; no runtime code changes shown. Main risk is accidental dependency/SDK constraint drift via pubspec.lock changes.

Overview
Prepares the 1.1.2 release by bumping package versions in pubspec.yaml and VERSION and adding a new CHANGELOG.md entry (including compare links).

Updates pubspec.lock as part of a publish/dry-run, changing several resolved transitive dependency versions/hashes and adjusting recorded SDK constraints.

^{Written by Cursor Bugbot for commit 461e79f. This will update automatically on new commits. Configure here.}