`Room(room_id).Tasks().show` does not recognize `opts` parameter?

Thank you for convenient api!

I want to get a user tasks.
So I use an `account` option.

```
room_id = "xxxx"
staff_id = "1234"
opts =
account: staff_id
status: "open"

Room(room_id).Tasks().show opts, (_, json) ->
```

But all tasks given.

I watch a log.
The `body` is correct.

```
Tasks: =>
show: (opts, callback) =>
params = []
params.push "account_id=#{opts.account}" if opts.account?
params.push "assigned_by_account_id=#{opts.assignedBy}" if opts.assignedBy?
params.push "status=#{opts.status}" if opts.status?
body = params.join '&'

@robot.logger.info body
# => account_id=1234&status=open

@get "#{baseUrl}/tasks", body, callback
```

But `request` has no params.

When watch the options, `path` has no query params.

```
# https://github.com/akiomik/hubot-chatwork/blob/master/src/chatwork.coffee#L217

logger.info options
request = HTTPS.request options, (response) ->

# { agent: false,
# host: 'api.chatwork.com',
# port: 443,
# path: '/v1/rooms/xxxxxx/tasks',
# method: 'GET',
# headers:
# { Host: 'api.chatwork.com',
# 'X-ChatWorkToken': 'xxxxxx',
# 'Content-Type': 'application/x-www-form-urlencoded',
# 'Content-Length': 29 } }
```

I hope that the path is `path: '/v1/rooms/xxxxxx/tasks?account_id=1234&status=open'.

I use node v0.10.25. It has breaking changes?

```
$ node -v
v0.10.25
```

thanks