The deprecation phase of the legacy "vibe-d:core" module starts with
this release by defaulting to the new "vibe-core" package. Additionally,
DMD 2.079.0 is finally supported, and some notable improvements have
been made to the HTTP implementation. URLRouter in particular has
received memory optimizations (to avoid fragmentation) that can result
in a heavy reduction of memory use.

See the change log for instructions to opt for the legacy vibe-d:core
module in case of any issues with vibe-core.

Change log:
https://vibed.org/blog/posts/vibe-release-0.8.3

DUB package:
https://code.dlang.org/packages/vibe-d/0.8.3