tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",   /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
        "target": "ES6",        /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
        "outDir": "dist",                        /* Redirect output structure to the directory. */
        "moduleResolution": "node",            /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */

        "noUnusedLocals": false,                /* Report errors on unused locals. */
        "forceConsistentCasingInFileNames": true,
        "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
        "noImplicitOverride": true,            /* Error to override a method without specifying the `override` keyword */
        "esModuleInterop": true,
        "allowJs": true
    },
    "types": ["node", "jest"],                           /* Type declaration files to be included in compilation. */
    "exclude": [
        "node_modules",
        "**/*.spec.ts",
        "dist"
    ]
}