tsconfig.json

{
  "compilerOptions": {
    "target": "ES2015",                                  /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */
    "module": "commonjs",                                /* Specify what module code is generated. */
    "outDir": "dist",                                    /* Specify an output folder for all emitted files. */
    "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. */
    "strict": true,                                      /* Enable all strict type-checking options. */
    "skipLibCheck": true,                                /* Skip type checking all .d.ts files. */
    "experimentalDecorators": true,                      /* Enable experimental support for ES7 decorators. */
   }
}