tsconfig.json

{
  "include": [
    "./",
    "./**/package.json",
    "./**/package-lock.json"
  ],
  "exclude": [
    "./node_modules",
    "./**/build",
    "./**/dist",
    "./**/__tests__"
  ],
  "compilerOptions": {
    "rootDir": ".",
    "outDir": "build",                                   /* Specify an output folder for all emitted files. */
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "lib": ["es6"],                                      /* Specify a set of bundled library declaration files that describe the target runtime environment. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "resolveJsonModule": true,                           /* Enable importing .json files. */
    "allowJs": true,                                     /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "strict": true,                                      /* Enable all strict type-checking options. */
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */

  }
}