tsconfig.json

{
    "compilerOptions": {
        /* Basic Options */
        "target":
            "ES2017" /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */,
        "module":
            "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
        "declaration": true /* Generates corresponding '.d.ts' file. */,
        "outDir": "dist" /* Redirect output structure to the directory. */,
        "rootDir":
            "." /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */,

        /* Strict Type-Checking Options */
        "strict": true /* Enable all strict type-checking options. */,
        "noImplicitAny": false /* Raise error on expressions and declarations with an implied 'any' type. */,
        "strictNullChecks": false /* Enable strict null checks. */,

        /* Module Resolution Options */
        "moduleResolution":
            "node" /* List of folders to include type definitions from. */ /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */,
        "types": ["node", "jasmine"] /* Type declaration files to be included in compilation. */
    },
    "include": ["index.ts", "src/core/**/*", "src/tests/**/*"],
    "exclude": ["node_modules"]
}