<Table /> component #326

Hi, thank you for creating this great library!

I’d like to request support for the new table block recently introduced in Slack Block Kit.

It seems that jsx-slack does not currently support this block type, and it would be very helpful for displaying structured data or tabular information directly in messages.

Use case:
I’d like to create Slack messages that include tabular data using JSX syntax, for example:

<Block>
  <Table>
    <TableRow>
      <TableCell>Header 1</TableCell>
      <TableCell>Header 2</TableCell>
    </TableRow>
    <TableRow>
      <TableCell>Value A</TableCell>
      <TableCell>Value B</TableCell>
    </TableRow>
  </Table>
</Block>