Function isWhitespace

isWhitespace(string: string): boolean
Check whether a string is empty or whitespace.

Time complexity: O(1)

Space complexity: O(1)
Parameters
- string: string
  String to check
Returns boolean
Whether the string is whitespace

String
Example
```
isWhitespace(' \n '); // true
```
Example
```
isWhitespace(''); // true
```
- Defined in src/string/is-whitespace.ts:27