Apps.upload() method not working

[ajithmohann]

Error Description: I am trying to upload content to the newly created app and getting following error.

internal/validators.js:168
throw new ERR_INVALID_ARG_TYPE(name,
^
TypeError [ERR_INVALID_ARG_TYPE]: The "buffer" argument must be an instance of Buffer, TypedArray, or DataView. Received type number (4096)
at Object.read (fs.js:496:3)
at reader (H:\Ajith\My Lab\Gaia CDN POC\test-restler\node_modules\restler\lib\multipartform.js:120:13)
at H:\Ajith\My Lab\Gaia CDN POC\test-restler\node_modules\restler\lib\multipartform.js:131:10
at FSReqCallback.oncomplete (fs.js:156:23) {
code: 'ERR_INVALID_ARG_TYPE'
}

Version Used: "cf-nodejs-client": "^0.13.0"

This seems like an issue with the 'restler' package used to upload the zipped binary content.