serializer/tsconfig.json

{
  "compilerOptions": {
    "noFallthroughCasesInSwitch": true,
    "noImplicitReturns": true,
    "preserveConstEnums": true,
    "strict": true,
    "declaration": true,
    "esModuleInterop": true,
    "lib": [
      "dom",
      "es6"
    ],
    "target": "es6"
  }
}