Can't omit field

Can't omit field

```
export const SchemaVideoData: Schema<TypeVideoDataInterface> = object({
    src: string().required(),
    width: number().required(),
    height: number().required(),
})
```

`const type2 = SchemaVideoData.omit(['src'])`

Get error:

`Property 'omit' does not exist on type 'Schema<TypeVideoDataInterface, any, any, "">'`
