tsconfig-def.json

{
    "compilerOptions": {
        "target": "es5" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */,
        "module": "esnext" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */,
        "lib": [
            "es2015",
            "dom"
        ] /* Specify library files to be included in the compilation. */,
        "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. */,
        "strictNullChecks": false,
        "resolveJsonModule": true,
        "moduleResolution": "node" /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
        "esModuleInterop": true /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */,
        "skipLibCheck": true /* Skip type checking of declaration files. */,
        "allowJs": false,
        "declaration": true,
        "emitDeclarationOnly": true,
        "forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
    },
    "include": ["src/*.ts", "src/*.js", "src/**/*.ts", "src/**/*.js"]
}