@after-change fires immediately after @before-change, even if :speed="3000"

[TitanFighter]

Describe the bug
@after-change fires immediately after @before-change, even if :speed="3000"

Code

<VueAgile
    :speed="3000"
    @before-change="test(true)"
    @after-change="test(false)"
>

and

methods: {
    test (trueOrFalse) {
        console.log('trueOrFalse:', trueOrFalse)
    }
}

Expected behavior
As I understand, @after-change must be fired once animation stopped.

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