tsconfig.json

{
  "compilerOptions": {
    /* Language and Environment */
    "target": "es2016",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */

    /* Modules */
    "module": "commonjs", 
    "resolveJsonModule": true,                        /* Enable importing .json files. */

    /* Emit */
    "outDir": "./build",                                   /* Specify an output folder for all emitted files. */

    /* Interop Constraints */
    "esModuleInterop": true,                             /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */
    "forceConsistentCasingInFileNames": true,            /* Ensure that casing is correct in imports. */

    /* Type Checking */
    "strict": true, 
    "skipLibCheck": true                                 /* Skip type checking all .d.ts files. */
  },
  "include": ["src/**/*.ts"],
  "exclude": ["node_modules"]
}