Search related error using the tag option

[Evan Niedojadło]

I used the command medium tag automation and returned the following error within the output:

`/usr/local/lib/node_modules/mediumcli/lib/post.js:71
for (var i = 0, len = Math.min(count, items.length); i < len; i++) {
^

TypeError: Cannot read property 'length' of undefined
at processContent (/usr/local/lib/node_modules/mediumcli/lib/post.js:71:45)
at /usr/local/lib/node_modules/mediumcli/lib/post.js:128:15
at Request._callback (/usr/local/lib/node_modules/mediumcli/lib/post.js:29:4)
at Request.self.callback (/usr/local/lib/node_modules/mediumcli/node_modules/request/request.js:188:22)
at emitTwo (events.js:106:13)
at Request.emit (events.js:191:7)
at Request. (/usr/local/lib/node_modules/mediumcli/node_modules/request/request.js:1171:10)
at emitOne (events.js:96:13)
at Request.emit (events.js:188:7)
at IncomingMessage. (/usr/local/lib/node_modules/mediumcli/node_modules/request/request.js:1091:12)
at IncomingMessage.g (events.js:291:16)
at emitNone (events.js:91:20)
at IncomingMessage.emit (events.js:185:7)
at endReadableNT (_stream_readable.js:974:12)
at _combinedTickCallback (internal/process/next_tick.js:74:11)
at process._tickCallback (internal/process/next_tick.js:98:9)`

[Edvins Antonovs]

Worth to close this issue, as this was already mentioned in #18.