M Stone

For MouseWheel event, type = 'flipped', should be 'mouseWheel'

1

In [index.d.ts](https://github.com/kmamal/node-sdl/blob/eaa72910e3f58fb14f944f1e815bcbc0a1d1fbf7/src/types/index.d.ts#L64), line 65: ``` export interface MouseWheel extends MouseEvent { readonly type: 'flipped' readonly dx: number readonly dy: number readonly flipped: boolean } ```

This corrects the type definition for MouseWheel, and addresses 2 critical security fixes #59