Change the offset on resize

[leandromatos]

It's possible to set new value of offset on window resize?

I try change props offset when window is resize, but the vue-headroom not recognized the new value of offset.

[joernroeder]

running into the same issue as my header height changes between breakpoints.
registering event listeners and debouncing this._setHeightOffset() should do it.

vuejs/vue#1915 (comment)
https://medium.com/vuejs-tips/tiny-debounce-for-vue-js-cea7a1513728