message: fix(build): properly output subdirectories like `rxjs/operators`
  The last alpha publish was missing appropriate references in the build script. This adds them back.
diff: "extends": "../tsconfig.json",
  "files": [
  "../dist/src/Rx.ts",
  - "../dist/src/add/observable/of.ts"
  + "../dist/src/add/observable/of.ts",
  + "../dist/src/index.ts",
  + "../dist/src/operators/index.ts",
  + "../dist/src/create/index.ts",
  + "../dist/src/ajax/index.ts",
  + "../dist/src/websocket/index.ts",
  + "../dist/src/testing/index.ts"
  ]
  }
  \ No newline at end of file
  