tsconfig.json

{
  "compilerOptions": {
    "target": "ES6" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */,
    "module": "ES2020" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
    "outDir": "./dist/" /* Redirect output structure to the directory. */,
    "declaration": true,
    "downlevelIteration": true,
    "sourceMap": true,
    "rootDirs": [
      "./src",
      "./tests"
    ] ,
    "strict": true /* Enable all strict type-checking options. */,
    "noImplicitAny": true /* Raise error on expressions and declarations with an implied 'any' type. */,
    "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
    "moduleResolution": "node",
    "allowJs": false
  },
  "exclude": ["node_modules", "**/*.test.ts"],
  "include": ["src"],
  "mode": "production",
}