tsconfig.json

{
  "compilerOptions": {
    // "rootDir": "src",
    // Language and Environment
    "target": "ES2017",
    "lib": [
      "ESNext"
    ],
    "experimentalDecorators": true,
    // Modules
    "module": "CommonJS",
    "moduleResolution": "node",
    // JavaScript support
    "allowJs": false,
    // Emit
    "declaration": true,
    "downlevelIteration": true,
    "importHelpers": false,
    "newLine": "LF",
    "stripInternal": true,
    "sourceMap": true,
    // Completeness
    "skipLibCheck": true,
    "skipDefaultLibCheck": true,
    // Interop Constraints
    "allowSyntheticDefaultImports": true,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    // Type Checking
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "outDir": "./dist",
    "strictNullChecks": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": false,
    "types": [
      "node",
      "jest",
      "reflect-metadata",
    ],
  },
  "exclude": [
    "dist*",
  ],
}