tfjs-npy doesn't work with the latest version of TensorFlow.js anymore

[caisq]

tfjs-npy version: 0.0.3
TensorFlow.js version: 0.14.2

The Tensor object returned by parse() can't be used properly by TensorFlow.js (e.g., its Model.predict() or Mdoel.fit() methods). If you try to do that, you'll get an error.

The workaround is to get the raw data out from the Tensor returned by parse() and create a new Tensor from it using tf.tensor2d() etc.