I think it is sad that people think we must change stories to reflect 'modern contemporary thought.' Let stories reflect the world they were written in. We can have our discussions around them as to what they mean.
And Dahl actually did make some changes in new editions himself. Perhaps the most notable being his changes to the portrayal of oompa-loompas. Dahl commented :
> I created a group of little fantasy creatures.... I saw them as charming creatures, whereas the white kids in the books were... most unpleasant. It didn't occur to me that my depiction of the Oompa-Loompas was racist, but it did occur to the NAACP and others.... After listening to the criticisms, I found myself sympathizing with them, which is why I revised the book. (in Mark West's Trust Your Children: Voices against Censorship in Children's Literature, 1988). [1]
But he wouldn't have approved of 99% of these changes. No way, no how. It's shockingly disrespectful of his estate to do this.
I don't know how far in the future you were thinking, but i am reasonably confident that as long as ironic t-shirts are a thing, "Han Shot First" will be a recognizable meme.