tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es2015",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    "sourceMap": true,                     /* Generates corresponding '.map' file. */
    "outDir": "./dist/",                        /* Redirect output structure to the directory. */
    "rootDir": "./src/",                       /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    "strict": true,                            /* Enable all strict type-checking options. */
    "noImplicitAny": false                 /* Raise error on expressions and declarations with an implied 'any' type. */
  }
}