chore(@nestjs/microservices) improve ClientGrpcProxy.getService typing

Author: micmro

packages/microservices/client/client-grpc.ts

@@ -25,7 +25,7 @@ export class ClientGrpcProxy extends ClientProxy implements ClientGrpc {
     this.grpcClient = this.createClient();
   }
 
-  public getService<T = any>(name: string): T {
+  public getService<T extends {}>(name: keyof T): T {
     const { options } = this.options as GrpcOptions;
     if (!this.grpcClient[name]) {
       throw new InvalidGrpcServiceException();

packages/microservices/interfaces/client-grpc.interface.ts

@@ -1,3 +1,3 @@
 export interface ClientGrpc {
-  getService<T = any>(name: string): T;
+  getService<T extends {}>(name: keyof T): T;
 }