call onRefresh after code is exchanged

The name `onRefresh` is suddenly less accurate, but you definitely want
this logic to run on all authentication responses.

src/create-client.ts

@@ -187,6 +187,7 @@ export async function createClient(
           if (authenticationResponse) {
             _authkitClientState = "AUTHENTICATED";
             setSessionData(authenticationResponse, { devMode });
+            _onRefresh && _onRefresh(authenticationResponse);
             onRedirectCallback({ state, ...authenticationResponse });
           }
         } catch (error) {