tsconfig.json

{
  "include": ["./src/**/*"],
  "compilerOptions": {
    "allowJs": false,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "declaration": true,
    "declarationMap": true,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "lib": ["es2017", "dom", "esnext.asynciterable"],
    "moduleResolution": "node",
    "noImplicitAny": false,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noFallthroughCasesInSwitch": true,
    "noLib": false,
    "noUnusedLocals": false,
    "noUnusedParameters": false,
    "removeComments": true,
    "resolveJsonModule": true,
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "outDir": "./dist",
    "rootDir": "./src",
    "target": "es6",
    "module": "commonjs"
  }
}