Range slider emits relayout evt on mousemove, should be only on mouseup

I have had the need to do something after the rangeslider had changed (update the min/max somewhere else on the page). I did not find any event that fired only after the slider had been released (a.k.a. mouseup) so I changed the rangeslider/draw.js:

function mouseUp() {
            dragCover.removeEventListener('mousemove', mouseMove);
            dragCover.removeEventListener('mouseup', mouseUp);
            Lib.removeElement(dragCover);
// --> new code
            gd.emit('plotly_rangesliderend', {
                axis: axisOpts,
                opts: opts
// --> end new code
            });

Is this anything that would be merged? Should I do a PR?

Start in rangeslider/draw.js at mouseUp and compare it with the mousemove path that emits relayout events. Trace the existing rangeslider event handling and coverage before deciding whether the desired behavior is a changed relayout event or a new end event. Done means the event behavior matches the issue’s mouseup-only requirement.