### How upgrade from 7.* to 8.*

If you didn't use the `speed` option, then you don't need to do anything extra, otherwise you need to reconsider the value
of this option. Read the description of the `speed` option. Now content scaling will be linear regardless of the scaling
step. Thanks for the help [@n8w8](https://github.com/n8w8). Discussion here [#36](https://github.com/worka/vanilla-js-wheel-zoom/issues/36).