`deep-object-diff` will now type the return type based off of the two objects passed in. 

```
  const result = diff(
    {
      some: "value",
      deep: {
        nested: {
          property: "value",
          array: [1, 2, 3],
        },
      },
    },
    { some: "value", other: 1 }
  );

  result.deep.nested.property; // $ExpectType string
  result.some; // $ExpectType string
  result.other; // $ExpectType number
  result.deep.nested.array; // $ExpectType number[]
```