Determine columns needed for a fixed-size wide-character string
```js ‘한’.length // => 1 wcwidth(‘한’); // => 2
‘한글’.length // => 2 wcwidth(‘한글’); // => 4 ```
wcwidth() and its string version,
wcswidth() are defined by IEEE Std
1002.1-2001, a.k.a. POSIX.1-2001, and return the number of columns used
to represent the given wide character and string.
Further explaination here