2026-03-19 – unit-threaded Fork, Upstream Bug Report, and PR

Forked unit-threaded to dlang-supplemental/unit-threaded to fix DUB sub-package reference warnings.

Fixed sub-package dependencies: changed from dependency "unit-threaded:subpackage" path="../.." to dependency "subpackage" path="../subpackage" so DUB uses path-to-package instead of package:subpackage form.

Wired in locally via dub add-local per DUB Local vs Remote Paths.

Submitted upstream bug report: #329.

Submitted upstream PR: #330.