tsconfig.json

{
    "compilerOptions": {
        "target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
        "module": "commonjs",
        "allowJs": true, /* Allow javascript files to be compiled. */
        "strict": true, /* Enable all strict type-checking options. */
        "outDir": "./lib", /* Redirect output structure to the directory. */
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    },
    "include": ["src"],
    "exclude": ["node_modules"]
}