Common/Subheading
==============
Represents a sub heading element.

```jsx
<div>
    <Subheading>Heading</Subheading>
    <Subheading size={2}>Heading</Subheading>
</div>
```

### Props

**size={number}**  
A value from 1 to 6 indicating the type of header to use, e.g. h1, h2, h3, etc.


### CSS
Adds the `dp-subheading` class to the element.