Dom Purify to remove all non-breaking space

I am using dompurify for a RichText component I have. I was hoping to add in a rule that would remove all &nbps; in the string. Here is some example code:

const content = '<p style="color:blue">Hello<span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span>world</p>' 

const customSanitizer = {
   FORBID_ATTR: ['id', 'data-react-mount', 'data-react-props-id'],
   ALLOW_DATA_ATTR: false, 
}

const cleanedContent = DOMPurify.sanitize(content, customSanitizer)

the desired result is that the value of cleanedContent equals:

<p style="color:blue">Hello world</p> 

is there anything I can add to customSanitizer to implement this?