tsconfig.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "resolveJsonModule": true,
    "esModuleInterop": true,
    "target": "es2015",
    "module": "es2020",
    "lib": ["es2018", "dom"],
    "types": ["node", "jest"]
  }
}