changelog: update according to the changes

Part of #321

Author: askalt

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
 
@@ -51,6 +52,17 @@ Versioning](http://semver.org/spec/v2.0.0.html) except to the first release.
   instead of `crud.OptUint` (#342)
 - Change all `Upsert` and `Update` requests to accept `*tarantool.Operations` 
   as `ops` parameters instead of `interface{}` (#348)
+- 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 `ProtocolInfo()` 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)
+- `pool.NewWatcher` does not create watchers for connections that do not support
+  it (#321)
+- Rename `pool.GetPoolInfo` to `pool.GetInfo`. Change return type to
+  `map[string]ConnectionInfo` (#321)
 
 ### Deprecated