Support for row-cols in <Row>

[kosmiq]

Is your feature request related to a problem? Please describe

Bootstrap 4.4 added .row-cols-x classes to the row class (https://getbootstrap.com/docs/4.4/layout/grid/#row-columns)

This would be an awesome addition to react-bootstrap.

Describe the solution you'd like

I'd imagine something like
<Row xs={[number]}></Row>

Thus having a similar usage as does when defining widths of columns.

The docs would of course need to be updated to reflect this.

Describe alternatives you've considered

I did briefly consider that it could be set as
<Row cols={[number]}></Row>
but then we would need
<Row cols-xs={[number]}></Row>
or similar to define breakpoints and that feels less clean.

Additional context

Bootstrap docs for row-cols: https://getbootstrap.com/docs/4.4/layout/grid/#row-columns

[taion]

We'd be happy to take a PR for this. I think e.g. a colsXs prop would be pretty reasonable, actually. It'd match what we have for <Col>.

[bcobra]

When will this be released?

[kyletsang]

This is available in 1.0.1: https://react-bootstrap.github.io/layout/grid/#row-layout-col-sizing

This can be closed