Nobody know whether the non-TB model will be discontinued in a few months when a 13" Macbook is released, or will remain on sale as is (2017 hardware with no price reduction) for the next 12 months, or even linger longer as the MBA has been doing for years, or the last 13" non-retina hung around for 2 years without updates.
But I think the chance of it getting an update at all, never mind in the next few months, is slim.