tsconfig.json

{
  "include": ["src/**/*", "typings"],
  "compilerOptions": {
    "baseUrl": "./",
    "paths": {},
    /* Strict Type-Checking Options */
    "strict": true,
    /* Others */
    "lib": ["dom", "es2015", "es2016.array.include"],
    "types": ["jest"],
    "outDir": "out/", // target for compiled files
    "target": "esnext",
    "module": "esnext",
    "moduleResolution": "node",
    "declaration": false, // emit declarations
    "importHelpers": false, // importing helper functions from tslib
    "noEmitHelpers": true, // disable emitting inline helper functions
    "noEmitOnError": true,
    // "noUnusedLocals": true,
    "pretty": true,
    "removeComments": true,
    "sourceMap": true,
    "stripInternal": true,
    "allowSyntheticDefaultImports": true,
    "esModuleInterop": true,
    "resolveJsonModule": true
  }
}