invalid package.json under demo directory (#83)
invalid package.json under demo directory (#83)

* invalid package.json under demo directory

remove the unnecessary comma at the end.

Signed-off-by: Yihong Wang <f520643bf8cff572a9eb593b2aa4ab3c892470e2@ibm.com>

tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs-node,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs,tensorflow/tfjs-node,tensorflow/tfjs,tensorflow/tfjs