CSidebarNavDropdown doesn't appear to be taking into account `show` property

[NeilJ247]

Library version: "@coreui/react": "^3.4.6"

Expected

By setting show property to true it should render the dropdown as open.

<CSidebarNavDropdown
      icon="cil-loop-circular"
      name="Switch Premises"
      show={true}
  >
      --- children --
  </CSidebarNavDropdown>

Actual

The dropdown is still closed.