tsconfig.json

{
    "compilerOptions": {
        "target": "ES2015", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019' or 'ESNEXT'. */
        "module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
        "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
        "outDir": "./lib", /* Redirect output structure to the directory. */
        "rootDir": "./src", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
        "strict": true, /* Enable all strict type-checking options. */
        "noImplicitAny": false, /* Raise error on expressions and declarations with an implied 'any' type. */
        "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
        "rootDirs": [
            "./src",
            "./test"
        ], /* List of root folders whose combined content represents the structure of the project at runtime. */
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    },
    "exclude": [
        "node_modules",
        "**/*.test.ts"
    ],
    "ts-node": {
        "transpileOnly": true, /* Only transpile, and do not type-check when running ts-node. */
        "swc": true /* Use ts-node's built-in SWC mode for transpilation. */
    }
}