tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "esnext",
    "module": "nodenext",
    "lib": ["ESNext", "dom"],                             /* Specify library files to be included in the compilation. */
    "allowJs": true,                       /* Allow javascript files to be compiled. */
    "checkJs": true,                       /* Report errors in .js files. */
    "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
    "outDir": "./types", // this is overritten by `npm run types`
    "baseUrl": "./src",                       /* Base directory to resolve non-absolute module names. */
    "rootDir": "./src",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    "emitDeclarationOnly": true,
    "strict": true,
    "noImplicitAny": true,
    "moduleResolution": "nodenext",
    "allowSyntheticDefaultImports": true
  },
  "include": ["./src"],
  "exclude": ["./dist", "./node_modules"]
}