This release brings in GWT 2.11.0 support for libGDX 1.12.1 ! This GWT release was not really expected to ever exist, since GWT had been slowly moving development effort into a new, incompatible repository, and the release after 2.10.0 was supposed to be GWT 3.0.0 or its equivalent from that new repository. It seems like that effort wasn't happening soon enough, and with some form of serious security issue discovered in GWT 2.10.0 and earlier (one that doesn't seem to affect many GWT games using libGDX, but might), a release was, to my surprise, issued today. Getting GWT 2.11.0 to work in place of 2.10.0 hasn't been hard so far, but there could easily be corner-case bugs like the one that affected Tiled in an earlier release here. We'll just have to find out!
There are quite a few new features and APIs in GWT 2.11.0, so even if the security aspect doesn't affect your applications (such as if they are a purely-client-side game), there are reasons to update.
Enjoy!