changelog: update according to the changes

CHANGELOG.md

@@ -26,6 +26,7 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
 - Support `IPROTO_FEATURE_SPACE_AND_INDEX_NAMES` for Tarantool
   version >= 3.0.0-alpha1 (#338). It allows to use space and index names 
   in requests instead of their IDs.
+- Support connection via an existing socket fd (#321)
 
 ### Changed
 
@@ -49,6 +50,13 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
   constants for `protocol` (#337)
 - Change `crud` operations `Timeout` option type to `crud.OptFloat64`
   instead of `crud.OptUint` (#342)
+- Make `Dialer` mandatory for creation a single connection / connection pool (#321)
+- Remove `Connection.RemoteAddr()`, `Connection.LocalAddr()`.
+  Add `Addr()` function instead (#321)
+- Remove `Connection.ClientProtocolInfo`, `Connection.ServerProtocolInfo`.
+  Add `Protocol()` function, which returns the server protocol info (#321)
+- `NewWatcher` checks the actual features of the server, rather than relying
+  on the features provided by the user during connection creation (#321)
 
 ### Deprecated