Under the hood
This release is version 2.1.278, bumped from 2.1.277
What
This group of changes is purely the build version metadata (version number, build time, and git commit hash) being updated from 2.1.277 to 2.1.278, repeated across the many copies of that metadata embedded throughout the bundled code.
Why
This is a routine version bump with no functional change on its own.