`update` event fires for all handles when one is changed with a key press

With multiple handles, moving one of them using the keyboard causes an update event to fire on all 3 handles.

noUiSlider.create(slider_el, {
    start: [30, 60, 90],
    behaviour: 'drag',
    connect: true,
    tooltips: [true, true, true],
    range: {
	'min': 0,
	'max': 100
    }
});
slider_el.noUiSlider.on('update', 
    function(v, h, u, t, p) { if (!t) { console.log('update:', h); }});
slider_el.noUiSlider.on('set', 
    function(v, h, u, t, p) { if (!t) { console.log('set:', h); }}

Expected output upon moving handle number 2 with keyboard:

update: 1
set: 1

Actual output:

update: 0
update: 1
set: 1
update: 2

This causes a bug with my solution in #957 when trying to move handle number 2 back past the margin of handle number 1; the event handler for handle number 1 gets executed first and modifies the position of handle number 2 such that when the update event for handle number 2 subsequently fires, there’s nothing to do.

[leongersen]

This is fixed in noUiSlider 13.1.3. Many thanks for contributing, @eoghanmurray! Much appreciated.

[github-actions[bot]]

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