validation of null rows.

[tharyckgusmao]

We have a problem with the validation operator for object type without null javascript and a type to point to an empty object. However validation breaks if I have rows with null values.

const isObject = typeof data[i] === 'object'

change to :

const isObject = typeof data[i] === 'object' && data[i] != null

[fjlaubscher]

hey @tharyckgusmao

You're more than welcome to create a PR if you'd like to contribute to the library and fix it yourself 😊