Notion API を TypeScript で書くと変な型エラーが出る

{
  //略
  "engines": {
    "node": "14.x"
  },
  "scripts": {
    "test": "ts-node -r dotenv/config index.ts"
  },
  "dependencies": {
    "@notionhq/client": "^0.1.3"
  },
  "devDependencies": {
    "dotenv": "^9.0.2",
    "ts-node": "^9.1.1",
    "typescript": "^4.2.4"
  }
}

NOTION_TOKEN = <Notion Internal Integration Token>
BLOCK_ID = <Notion Page ID>

import { Client } from "@notionhq/client";
const notion = new Client({ auth: process.env.NOTION_TOKEN });

(async () => {
  const blockId = process.env.BLOCK_ID!;
  const response = await notion.blocks.children.append({
    block_id: blockId,
    children: [
      {
        object: "block",
        type: "heading_2",
        // @ts-ignore
        heading_2: {
          text: [
            {
              type: "text",
              text: {
                content: "Lacinato kale",
              },
            },
          ],
        },
      },
      {
        object: "block",
        type: "paragraph",
        // @ts-ignore
        paragraph: {
          text: [
            {
              type: "text",
              text: {
                content:
                  "Lacinato kale is a variety of kale with a long tradition in Italian cuisine, especially that of Tuscany. It is also known as Tuscan kale, Italian kale, dinosaur kale, kale, flat back kale, palm tree kale, or black Tuscan palm.",
                link: {
                  url: "https://en.wikipedia.org/wiki/Lacinato_kale",
                },
              },
            },
          ],
        },
      },
    ],
  });
  console.log(response);
})();