Deep Omit 
by bowen @jiaowoxiaobala
Implement a type`DeepOmit`, Like Utility types [Omit](https://www.typescriptlang.org/docs/handbook/utility-types.html#omittype-keys), A type takes two arguments.
For example:
```ts
type obj = {
person: {
name: string;
age: {
value: number
}
}
}
type test1 = DeepOmit // {}
type test2 = DeepOmit // { person: { age: { value: number } } }
type test3 = DeepOmit // { person: { name: string; age: { value: number } } }
type test4 = DeepOmit // { person: { name: string; age: {} } }
```
