Update vue-cropper.vue
Update vue-cropper.vue

I added a fit function for the component. Which takes ratio of the original image and force crop area to fit the image. I did not test it yet implemented it outside of the component and it works.
xyxiao001/vue-cropper,xyxiao001/vue-cropper,xyxiao001/vue-cropper,xyxiao001/vue-cropper