tsconfig.json

{
  "compilerOptions": {
    "target": "ES2017",
    "module": "commonjs",
    "moduleResolution": "node",
    "declaration": true,
    "strict": true,
    "noImplicitAny": false,
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "importHelpers": true,
    "skipLibCheck": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "sourceMap": true,
    "forceConsistentCasingInFileNames": true,
    "outDir": "./dist/",
    "typeRoots": [
      "./node_modules/@types"
    ],
    "types": [
      "node",
      "jest",
      "reflect-metadata"
    ],
    "lib": [
      "ES2017"
    ]
  },
  "include": [
    "src/**/*.ts"
  ],
  "exclude": [
    "node_modules",
    "**/*.test.ts"
  ]
}