astro/packages/create-astro/tsconfig.json

{
  "extends": "../../tsconfig.base.json",
  "include": ["src", "index.d.ts"],
  "compilerOptions": {
    "allowJs": true,
    "target": "ES2019",
    "module": "ES2020",
    "outDir": "./dist",
    "declarationDir": "./dist/types"
  }
}