message: build: add systemjs entry points to tsconfig.base.json
diff: "../dist/src/internal/Rx.ts",
  "../dist/src/add/observable/of.ts",
  "../dist/src/index.ts",
  - "../dist/src/operators/index.ts",
  - "../dist/src/ajax/index.ts",
  - "../dist/src/websocket/index.ts",
  - "../dist/src/testing/index.ts"
  + "../dist/src/operators.ts",
  + "../dist/src/ajax.ts",
  + "../dist/src/websocket.ts",
  + "../dist/src/testing.ts"
  ]
  }
  