{
  "compilerOptions": {
      "target": "es6",
      "module": "commonjs",
      "sourceMap": true,
      "outDir": "build/"
  },
  "include": [
      "src/*"
  ],
  "exclude": [
      "node_modules",
      "**/*.spec.ts"
  ]
}

{
  "compilerOptions": {
      "target": "es6",
      "module": "commonjs",
      "sourceMap": true,
      "outDir": "build/",
      "strict": true
  },
  "include": [
      "src/*"
  ],
  "exclude": [
      "node_modules",
      "**/*.spec.ts"
  ]
}

Enable 'strict' in compiler options
Enable 'strict' in compiler options

