Function isNil

isNil(value): value is undefined | null
Checks if value is null or undefined.
Parameters
- value: any
  The value to check.
Returns value is undefined | null
Returns true if value is nullish, else false.
Since
4.0.0
Example
```
isNil(null)
// => true

isNil(void 0)
// => true

isNil(NaN)
// => false
```
- Defined in lodash/#isNil.tsx:19