tsconfig.json

{
    "compilerOptions": {
        "strict": true,
        "target": "es5",
        "declaration": true,
        "moduleResolution": "node",
        "module": "commonjs",
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "sourceMap": true,
        "outDir": "dist",
        "sourceRoot": "../src"
    },
    "exclude": [
        "node_modules",
        "test"
    ],
    "types": [
        "node",
        "jest"
    ],
    "lib": [
        "es2017"
    ]
}