So far, the only thing they made more modern was a refference to DVRs, and poking fun at one of the characters still having a VCR. I'm pretty sure the only reason they did this was because most kids reading the book wouldn't know what a VCR was.
Other than that, any other outdated refferences were more "neutralised". Like for example, instead of saying Jake had a Sega, they say he has a gaming system.