TypeError with unflatten when destination property is null

[A]

// ok
flat.unflatten({ 'a.b': 'c' }); // { a: { b: 'c' } }
// not ok
flat.unflatten({ a: null, 'a.b': 'c' }); // TypeError: Cannot set property 'b' of null

Probably, it happens because of 'object' === typeof null, but I didn't see the source

[timoxley]

Released in 2.0.0. I've bumped major on this because the behaviour around overwriting non-object values is changed from 1.x.

[A]

Thank you)