Subtasks

# What 

Added subtasks endpoint

Subtasks
=====

Subtasks are little sentences under a task that could de resolved or not.

Lists subtasks in your visibility scope. Needs a task_id

```Ruby
  subtask_collection = client.subtask(:index, task_id: 123)
  subtasks = subtask_collection.all
```

You can also filter by multiple params (see docs [here](https://redbooth.com/api/api-docs/#page:subtasks,header:subtasks-subtasks-list) )

```Ruby
  filtered_subtasks = client.subtask(:index, task_id: 123,
                                             order: 'id-DESC',
                                             per_page: 50)
```

Fetch a specific subtask

```Ruby
  subtask = client.subtask(:show, id: 123)
```

Update a specific subtask

```Ruby
  subtask = client.subtask(:update, id: 123, name: 'new name')
```

Delete a specific subtask

```Ruby
  client.subtask(:delete, id: 123)
```