Release v0.9.0 - Seongmodo (석모도, 席毛島)

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

CHANGELOG.md

@@ -1,7 +1,28 @@
 # Changelog
 Changelog for NeoFS Contract
 
-## [0.8.0] - 2021-04-19 - Dolsando (돌산도, 突山島)
+## [0.9.0] - 2021-06-03 - Seongmodo (석모도, 席毛島)
+
+Session token support in container contract.
+
+### Fixed
+- `_deploy` methods process `isUpdate` argument now.
+
+### Added
+- Changelog file.
+- `netmap.NetmapCandidates` method.
+
+### Changed
+- Container contract now stores public key, signature and session token of
+  new containers and extended ACL tables.
+- Most of the contract methods that invoked by inner ring do not return bool
+  value anymore. Such methods throw panic instead.
+- Migrate methods now accept data.
+
+### Removed
+- Container and extended ACL signature checks in container contract.
+
+## [0.8.0] - 2021-05-19 - Dolsando (돌산도, 突山島)
 
 N3 Testnet RC2 compatible contracts.
 
@@ -122,6 +143,7 @@ Preview4-testnet version of NeoFS contracts.
 
 Preview4 compatible contracts.
 
+[0.9.0]: https://github.com/nspcc-dev/neofs-contract/compare/v0.8.0...v0.9.0
 [0.8.0]: https://github.com/nspcc-dev/neofs-contract/compare/v0.7.0...v0.8.0
 [0.7.0]: https://github.com/nspcc-dev/neofs-contract/compare/v0.6.0...v0.7.0
 [0.6.0]: https://github.com/nspcc-dev/neofs-contract/compare/v0.5.1...v0.6.0