Apple released High Sierra 10.13.3 update this morning (App Store). I have been tracking this update in the High Sierra Beta for a while, it is definitely ready for prime time. I installed the update on my main Mac. All seems to be just fine. The install takes about 20 minutes, YMMV. If you wanted to wait for the combo updater I am sure it will be posted by tomorrow. This update has further fixes for the Spectre and Meltdown Intel problems discovered earlier this month and there are other fixes as well. After the initial install bootup, I suggest doing another Restart. 10.13.3 is very snappy.