tsconfig.json

{
  "compilerOptions": {
    "target": "esnext",
    "module": "commonjs",
    "strict": true,
    "sourceMap": true,
    "noImplicitAny": true,
    "noUnusedLocals": true,
    "noImplicitReturns": true,
    "moduleResolution": "node",
    "allowSyntheticDefaultImports": true,     /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "experimentalDecorators": true,           /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true,
    "declaration": true,
    "resolveJsonModule": true,
    "types" : [
      "node"
    ],
    "incremental": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "baseUrl": "./",
    "typeRoots": [
      "./node_modules/@types"
    ],
    "outDir": "./dist"
  }
}