Represents a sub heading element.
<div>
<Subheading>Heading</Subheading>
<Subheading size={2}>Heading</Subheading>
</div>size={number}
A value from 1 to 6 indicating the type of header to use, e.g. h1, h2, h3, etc.
Adds the dp-subheading class to the element.