tsconfig.json

{
  "compilerOptions": {
    "incremental": true,            /* Enable incremental compilation */
    "target": "es6",                /* Specify ECMAScript target version: */
    "module": "commonjs",           /* 'none', 'commonjs', 'amd', 'system', etc */
    "declaration": true,            /* Concatenate & emit output to single file.*/
    "outDir": "src",           /* Redirect output to the directory. */
    "esModuleInterop": true,        /* Enables intero between CommonJS and ES */
    "skipLibCheck": true,           /* Skip type checking of declaration files. */
    "forceConsistentCasingInFileNames": true, /* Disallow inconsistently */
    "experimentalDecorators": true
  },
  "include": [
    "src"
  ],
  "exclude": ["node_modules", "**/__tests__/*"]
}