Bug#1030558: toil build-depends on missing python3-xdist

[Adrian Bunk]

Source: toil
Version: 5.9.0-1
Severity: serious
Tags: ftbfs

https://buildd.debian.org/status/package.php?p=toil&suite=sid

toil build-depends on missing:
- python3-xdist:amd64


Should this be python3-pytest-xdist?