spacing prop is bleeding into dom

[zacklitzsinger]

The spacing prop is showing up in some elements in the dom.

<h5 spacing="[object Object]" class="H5-jGFWse ezBfpZ">Header</h5>

[a-type]

Was hoping clean-tag would fix that...

[zacklitzsinger]

It looks like clean-tag only removes out props in the prop types of styled-components. We probably want to add our own blacklist, but it's annoying to keep it out of the docs pages.