The last gameplay update that DotA received was 6.83c. As of now, the latest version of Dota 2 is 6.88b, which is seventeen versions ahead, five of which are major versions.
Historically, DotA had typically gotten updates within two months of Dota 2 getting it. As of now it has been over a year since the last gameplay update for DotA, so I think it is safe to assume that Icefrog has given up on trying to maintain parity. I find this especially probable because I don't believe that it is even possible to port some of the newer mechanics to the Warcraft 3 engine anyway.
However, there is a third-party group who has redone several further patches and made their own bugfixes for DotA 1, calling their fork DotA Allstars again. They're up to 6.85 right now. I'm not sure how much they will manage to port in the future, but you may be interested in that: http://d1stats.ru/