Update CHANGELOG.md

Author: root28root

CHANGELOG.md

@@ -5,3 +5,9 @@
 - ✅ CI (GitHub Actions) + repo-wide tests `./tools/check.sh`
 - ✅ 8 unit tests across packages (2 per project)
 - ✅ Devnet publish + demo entry points documented
+
+## v0.2.0 — PaySplit + Vesting, CI hardening
+- New: **PaySplit** — proportional revenue splitter (3 unit tests).
+- New: **Vesting** — linear vesting with internal balances (3 unit tests).
+- Docs: READMEs for paysplit/ and vesting/, root README updated with Devnet links.
+- CI: resilient Aptos CLI installer with retries + sanity checks.