tsconfig.json

{
  "compilerOptions": {
    "allowJs": true,
    "allowSyntheticDefaultImports": true,
    "alwaysStrict": true,
    "checkJs": true,
    "emitDecoratorMetadata": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true,
    "isolatedModules": true,
    "lib": [
      "ES6"
    ],
    "module": "CommonJS",
    "moduleResolution": "node",
    "noImplicitAny": true,
    "noImplicitReturns": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "outDir": ".build",
    "preserveConstEnums": true,
    "resolveJsonModule": true,
    "rootDir": "./",
    "skipLibCheck": true,
    "sourceMap": true,
    "strict": true,
    "strictBindCallApply": true,
    "strictFunctionTypes": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": true,
    "target": "ES5"
  },
  "exclude": [
    "node_modules"
  ],
  "include": [
    "src"
  ]
}