Add CHANGELOG links

Signed-off-by: Thane Thomson <[email protected]>

CHANGELOG.md

@@ -3,8 +3,8 @@
 ### BREAKING CHANGES
 
 * `[tendermint]` The `tendermint::block::CommitSig` enum's members have been
-  renamed to be consistent with Rust's naming conventions (e.g.
-  `BlockIDFlagAbsent` is now renamed to `BlockIdFlagAbsent`).
+  renamed to be consistent with Rust's naming conventions. For example,
+  `BlockIDFlagAbsent` is now renamed to `BlockIdFlagAbsent` ([#839])
 * `[tendermint-rpc]` The `SubscriptionClient` trait now requires a `close`
   method, since it assumes that subscription clients will, in general, use
   long-running connections. This should not, however, break any downstream
@@ -15,9 +15,9 @@
   require some minor code changes in some cases - see the crate docs for more
   details ([#820])
 * `[tendermint-rpc]` The `event::EventData::GenericJSONEvent` member has been
-  renamed to `event::EventData::GenericJsonEvent`.
+  renamed to `event::EventData::GenericJsonEvent` ([#839])
 * `[tendermint-testgen]` The `TMLightBlock` data structure has been renamed to
-  `TmLightBlock` to be consistent with Rust's naming conventions.
+  `TmLightBlock` to be consistent with Rust's naming conventions ([#839])
 
 ### FEATURES
 
@@ -38,6 +38,7 @@
 [#794]: https://github.com/informalsystems/tendermint-rs/pull/794
 [#812]: https://github.com/informalsystems/tendermint-rs/pull/812
 [#820]: https://github.com/informalsystems/tendermint-rs/pull/820
+[#839]: https://github.com/informalsystems/tendermint-rs/pull/839
 
 ## v0.18.1