feat: Forgot to expose noOfIsolates on serve extension on RelicApp

lib/src/adapter/io/io_serve.dart

@@ -19,16 +19,20 @@ extension RelicAppIOServeEx on RelicApp {
     final int port = 8080,
     final SecurityContext? securityContext,
     final int backlog = 0,
+    final bool v6Only = false,
     final bool shared = false,
+    final int noOfIsolates = 1,
   }) {
     return run(
       () => IOAdapter.bind(
         address ?? InternetAddress.loopbackIPv4,
         port: port,
         context: securityContext,
         backlog: backlog,
-        shared: shared,
+        v6Only: v6Only,
+        shared: shared || noOfIsolates > 1,
       ),
+      noOfIsolates: noOfIsolates,
     );
   }
 }

lib/src/relic_server.dart

@@ -230,7 +230,8 @@ final class _MultiIsolateRelicServer implements RelicServer {
   _MultiIsolateRelicServer(
     final Factory<Adapter> adapterFactory,
     final int noOfIsolates,
-  ) : _children = List.generate(
+  ) : assert(noOfIsolates > 1),
+      _children = List.generate(
         noOfIsolates,
         (_) => _IsolatedRelicServer(adapterFactory),
       );

test/router/relic_app_test.dart

@@ -92,7 +92,7 @@ void main() {
       final called = StreamController<int>();
       final app = RelicApp()..inject(_Injectable(() => called.add(++count)));
 
-      await app.serve();
+      await app.serve(noOfIsolates: 2);
 
       final vmService = await vmi.vmServiceConnectUri(wsUri.toString());