tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "lib": ["dom", "es6", "es2017", "esnext.asynciterable"],
        "types": ["reflect-metadata", "node"],
        "skipLibCheck": true,
        "removeComments": true,
        "esModuleInterop": true,
        "target": "es6",
        "moduleResolution": "node",
        "sourceMap": true,
        "outDir": "dist",
        "strict": true,
        "strictNullChecks": true,
        "strictFunctionTypes": true,
        "noImplicitAny": true,
        "noImplicitReturns": true,
        "noImplicitThis": true,
        "noUnusedLocals": true,
        "noUnusedParameters": true,
        "noFallthroughCasesInSwitch": true,
        "allowSyntheticDefaultImports": true,
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "resolveJsonModule": true
    },
    "exclude": ["node_modules"],
    "lib": ["es2015"]
}