tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true,
    "allowJs": false,
    "allowUnreachableCode": false,
    "allowUnusedLabels": false,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "forceConsistentCasingInFileNames": true,
    "allowSyntheticDefaultImports": false,
    "alwaysStrict": true,
    "strict": true,
    "strictFunctionTypes": true,
    "strictPropertyInitialization": true,
    "moduleResolution": "node",
    "baseUrl": "./node_modules",
    "noImplicitAny": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "noUnusedParameters": true,
    "preserveConstEnums": true,
    "pretty": true,
    "rootDir": "./src",
    "declaration": false,
    "experimentalDecorators": true,
    "newLine": "LF",
    "outDir": "dist",
    "lib": [
      "es5",
      "es6",
      "es7"
    ]
  },
  "exclude": [
    "node_modules"
  ]
}