tsconfig.json

{
  "compilerOptions": {
    "target": "es2017",
    "lib": ["es2017", "ES2018.AsyncIterable"],
    "typeRoots": ["node_modules/@types", "src/types/index.ts"],
    "allowSyntheticDefaultImports": true,
    "forceConsistentCasingInFileNames": true,
    "moduleResolution": "node",
    "module": "commonjs",
    "pretty": true,
    "sourceMap": true,
    "outDir": "./build",
    "allowJs": true,
    "noEmit": false,
    "resolveJsonModule": true,
    "declaration": true,
    "esModuleInterop": true,
    "experimentalDecorators": true /* Enables experimental support for ES7 decorators. */,
    "emitDecoratorMetadata": true /* Enables experimental support for emitting type metadata for decorators. */
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "tests"]
}