Allow to pass innerRef to CardBody

[sevdog]

Issue description

At the moment Card component allows to pass innerRef to get a refence of inner element, but CardBody does not.

There are some use case in which someone whould use a full card (ie: Card, CardHeader, CardBody, CardFooter, etc...) and will want to references the body.

• components: CardBody
• reactstrap version #6.5.0

Example

<Card>
  <CardHeader>My title</CardHeader>
  <CardBody innerRef={myRef}>
    content which may be very long
    and scroll
  </CardBody>
  <CardFooter>My footer info</CardFooter>
</Card>