tsconfig.json

{
    "compilerOptions": {
      "experimentalDecorators": true,
      "outDir": "../dist",
      "module": "umd",
      "target": "es2016",
      "sourceMap": true,
      "noImplicitAny": true,
      "strictNullChecks": true,
      "removeComments": false,
      "moduleResolution": "node"
    },
    "exclude": [
      "node_modules",
      "bower_components",
      "dist"
    ]
  }