Sketch doesn't resize properly after class redefinition 
Hello,

If you try to redefine sketch which was either created with different from default size, or if you redefine size itself, it will stop rendering properly.

(Example: redefined from `(width 400)` to `(width 800)`)
![before-redefine](https://user-images.githubusercontent.com/59411603/201185103-1dff379e-8798-41c7-abc6-4ad3ab144d79.png)
![after-redefine](https://user-images.githubusercontent.com/59411603/201185094-51d1b060-daa2-424c-893e-e94e53a9510a.png)

Adding method for `window-event` `:resize` as in https://github.com/vydd/sketch/issues/59 fixes this problem.