[tooling] Support updating tfjs-node / tfjs-node-gpu versions (#327)
[tooling] Support updating tfjs-node / tfjs-node-gpu versions (#327)

- Add option flag `--node` to the `update-tfjs-version` script.

tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples,tensorflow/tfjs-examples