tsconfig.json

{
    "compilerOptions": {
        "target": "es6",
        "module": "commonjs",
        "lib": ["esnext"],
        "declaration": true,
        "outDir": "./dist",
        "downlevelIteration": true,
        "isolatedModules": true,
        "strict": true,
        "noImplicitAny": true,
        "strictNullChecks": true,
        "strictFunctionTypes": true,
        "strictBindCallApply": true,
        "strictPropertyInitialization": true,
        "noImplicitThis": true,
        "alwaysStrict": true,
        "noFallthroughCasesInSwitch": true,
        "moduleResolution": "node",
        "esModuleInterop": true,
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true,
        "skipLibCheck": true,
        "forceConsistentCasingInFileNames": true
    }
}