message: Get test coverage report working for source/backend
diff: "@bentley/imodeljs-n_8_9-win32-x64": "~8.1.0",
  "cpx": "^1.5.0",
  "mocha": "^3.5.3",
  - "mocha-junit-reporter": "^1.15.0",
  "nyc": "^11.4.1",
  "rimraf": "^2.6.2",
  "source-map-support": "^0.5.0",
  ],
  "nyc": {
  "include": [
  - "./**/*.ts",
  - "../common/**/*.ts"
  + "*.ts"
  ],
  "exclude": [
  "./test/*",
  