tsconfig.json

{
    "compilerOptions": {
        "skipLibCheck": true,
        "allowSyntheticDefaultImports": true,
        "module": "commonjs",
        "target": "es6",
        "outDir": "./build",
        "lib": [
            "es6"
        ],
        "sourceMap": true,
        "rootDir": "."
    },
    "include": [
        "./src"
    ],
    "exclude": [
        "node_modules"
    ]
}