Publishing error

Hi Andy @lambtron

First, thanks for creating this very useful app. Like you , I wish if I could publish Medium from CLI

I installed it thru npm and looks every thing is working fine except for the publishing .. here is a complete view of what I did .. Please advise if I am missing anything

`bash-4.3$ pwd
/home/ajain/buzzfeed
bash-4.3$ medium login

medium · Please open https://medium.com/me/settings in your browser.
· At the bottom of the page, under Integration Tokens, copy
· this description:

     · "Medium-CLI basic publishing access."

     · Then generate the new token and copy it.

Paste your Integration Token here:
#####################################################################

     · Authenticating into Medium..

     · Saved!

bash-4.3$ medium publish
(node:19796) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Cannot read property 'split' of undefined
bash-4.3$ ls
articles
bash-4.3$ cd articles/
bash-4.3$ ls
test-post-from-medium-cli
bash-4.3$ cd test-post-from-medium-cli/
bash-4.3$ ls
index.md
bash-4.3$ cat index.md

title: test post from medium command line interface
tags:
canonicalUrl:
publishStatus: draft
license: all-rights-reserved

Testing a post from medium command line interface
bash-4.3$ `

Reproduce the failure with medium publish from an article directory containing index.md, using the command sequence and front matter shown in the issue. Trace the CLI's publish entry point to find where the undefined value reaches split; done means this example no longer produces the unhandled rejection and publishing reports a clear result.