message: Use native test gulp task
diff: "start:debug": "gulp debug",
  "start:inspect": "gulp inspect",
  "start:poll": "gulp watch:poll",
  - "pretest": "gulp test",
  + "pretest": "gulp test:native",
  "test": "istanbul cover --report json node_modules/mocha/bin/_mocha",
  "posttest": "gulp remap:coverage",
  "lint": "gulp tslint",
  