12.2.0

[github-actions]

This is the release candidate for version 12.2.0.

---

Note

Release 12.2.0 with version bump and changelog entry for useCache option in PollingBlockTracker.getLatestBlock().

• Release 12.2.0:
  • Bump package version in package.json to 12.2.0.
  • Update CHANGELOG.md:
    • Add 12.2.0 section documenting optional useCache param for PollingBlockTracker.getLatestBlock().
    • Update compare links ([Unreleased] now compares from v12.2.0; add [12.2.0] link).

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[Gudahtt]

LGTM