Flatten arrays to string

Hi, I have a unique use-case, I am currently building a dynamic table based on an object's keys. So this does not work correctly when the object has an array associated with it. Would it be possible to add an additional parameter to specify that arrays should be strings with the safe option associated?

for example:
`flatten({
title:'Hello world',
countries: ['ZAF','USA','GRL']
}, {
safe:true,
arraytostring:true
});

//output:
// {
// title:'Hello World',
// countries: '["ZAF","USA","GRL"]'
`

If you do not want to add this functionality to your repo, can I clone the project and add this for my specific use-case?