Add changelog for new contracts
# zkSync changelog
+### Contracts v3 and protocol (4.09.2020)
+
+- Change pubkey operation requires fee for processing.
+- Added support for the force exit operation when user can force withdrawal from another account
+ that does not have signing key set and is older than 24h.
+
### zksync.js 0.6.3
- Bundled version for browsers added. File `dist/main.js` can be used in `<script>` html tag.
