title: Typeorm doesn't return generated data id
body: <p>Im using Typeorm (v8.0.2) and Nestjs(v8) with Nodejs(v16).
  My problem is when I create a book Typeorm doesn't return generated book id</p>
  <p>Here is <strong>Book.entity</strong></p>
  <pre><code>@Entity()
  export class Book {
  
  @PrimaryGeneratedColumn('increment')
  id: number;
  
  @Column()
  title: string;
  
  @Column()
  author: string;
  }
  </code></pre>
  <p>And this is <strong>book.service</strong></p>
  <pre><code>async createBook(createBookDto: CreateBookDto): Promise&lt;Book&gt; {
    const book = await this.bookRepository.create(createBookDto)
    await this.bookRepository.save(createBookDto)
    return book
  }
  </code></pre>
  <p>and when I use postman and create a Book it just returns</p>
  <pre><code>{
     title: &quot;example&quot;
     author: &quot;foo&quot;
  }
  </code></pre>
  <p>id of generated book is missing</p>