Update CHANGELOG.md

CHANGELOG.md

@@ -5,6 +5,59 @@ All notable changes to Zebra are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [Zebra 1.3.0](https://github.com/ZcashFoundation/zebra/releases/tag/v1.3.0) - 2023-09-25
+
+This release provides support for the Spend before Sync synchronization
+strategy, and contains the following updates:
+
+### Security
+
+- Avoid panics and history tree consensus database concurrency bugs (#7590)
+
+### Added
+
+- Add missing elasticsearch flag feature to lib docs (#7568)
+- Add self hosted runner for long tests (#7520)
+- Add missing Docker variables and examples (#7552)
+
+#### Spend before Sync support
+
+- Add state requests and support code for the `z_getsubtreesbyindex` RPC (#7408)
+- Implement the `z_getsubtreesbyindex` RPC (#7436)
+- Add snapshot tests for the `z_getsubtreesbyindex` RPC (#7514)
+- Add fixed test vectors for `z_getsubtreesbyindex` from zcashd to zebra ([#7515]
+- Test `z_getsubtreesbyindex` using a lightwalletd gRPC request (#7521)
+- Refactor docs for `z_getsubtreesbyindex` RPC state requests (#7462)
+- Use correct end heights for end of block subtrees during the full sync (#7566)
+- Format subtree roots in little-endian order (#7466)
+- Add note subtree indexes for new and existing blocks (#7437)
+- Upgrade subtrees from the tip backwards, for compatibility with wallet syncing (#7531)
+- Add code comments to state validity test for subtree format upgrade (#7496)
+- Format subtree roots in little-endian order (#7466)
+- Compare subtrees in non-finalized chains when evaluating chain equality (#7562)
+- Handle a subtree comparison edge case correctly (#7587)
+- Use correct end heights for end of block subtrees during the full sync (#7566)
+- Upgrade subtrees from the tip backwards, for compatibility with wallet syncing (#7531)
+- Add code comments to state validity test for subtree format upgrade (#7496)
+
+### Changed
+
+- Check database format is valid every 5 minutes, to catch format errors in new block code (#7602)
+- Check database format is valid on shutdown, to catch format errors in new block code (#7606)
+- Restrict access to types for database writes (#7440)
+- Return errors instead of panicking in methods for Heights (#7591)
+- Update tests for new lightwalletd version used in Zebra ([#7349]
+
+### Fixed
+
+- Refactor docs for feature flags (#7567)
+- Match zcashd's getblockchaininfo capitalisation for NU5 (#7454)
+
+### Contributors
+
+Thank you to everyone who contributed to this release, we couldn't make Zebra without you:
+@arya2, @gustavovalverde, @oxarbitrage, @rex4539, @teor2345 and @upbqdn.
+
 ## [Zebra 1.2.0](https://github.com/ZcashFoundation/zebra/releases/tag/v1.2.0) - 2023-09-01
 
 ### Highlights