message: fix(api): don't render property attribute if none
diff: @@ -77,7 +77,7 @@ const renderProperties = (properties) => {
  keys={{
  Head: prop => prop.name,
  Description: prop => <div innerHTML={prop.docs}/>,
  - Attribute: prop => <code>{ prop.attr }</code>,
  + Attribute: prop => prop.attr ? <code>{ prop.attr }</code> : null,
  Type: prop => <code>{ prop.type }</code>
  }}/>
  </section>
  