Sony Mobile started to roll out a new firmware update for the Xperia XZ2 range (XZ2, XZ2 Compact, XZ2 Premium) and Xperia XZ3 earlier today. The latest update moves the build number from 52.0.A.3.202 to version 52.0.A.8.14, adding the March 2019 Android security patches in the process.
There are no other big changes noted. Those hoping for a big camera jump will be disappointed, as the camera app has only seen a small version jump to build 2.2.A.1.7. If you have updated, please let us know of any changes you have noticed in the comments below.
Thanks Niaboc79!