Function isNil

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

isNil(undefined);
// => true

isNil(NaN);
// => false
```
- Defined in types/isNil.ts:17