Don't set keyup/down events if config not set

[chrisjowen]

Currently the keydown/up events are set and stop defaults even when config specify not using keys. As such not I cannot type into text boxes. Can these events only be set if the config flag is set true

[DariaKaidalova-2]

I have the same problem. I also cannot select text.

[paulintrognon]

Use this one instead: https://github.com/NightCatSama/vue-slider-component