There are currently two up-to-date versions of stdlib on the mod portal, mine and stdlib2 (as well as a third minimum effort version that has basically changed nothing but the name of the mod in all files to make it load)
stdlib2 is the more "official" project that actually has a github and multiple collaborators working on it (including a couple of my own edits), but hasn't actually released any of the more recent contributions, and the owner of that fork isn't particularly interested in maintaining the mod, so the version on the mod portal is still partially broken (most of the recipe functions and data:copy on recipes is not working)
My version of the stdlib was a bit more quick and dirty, and not the most professional (as I didn't use github for any of the changes), but it has basically all of the runtime changes that are currently in stdlib2, as well as fixed versions of all of the data/recipe functions (as well as some extra functions that I haven't committed to the stdlib2 project, since they aren't exactly critical for functionality)
If you need recipe functionality, your only option is my version atm, until stdlib2 releases another version (which may or may not happen, depending on the whims of the author). If you only need runtime fixes, stdlib2 should suffice (but I believe my version has the same fixes in place, and possibly more).