debian/control: Add python3-pytest as build dependency

8 jobs for master in 22 minutes and 8 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Build
passed #356540
build

00:09:20

 
  Test
passed #356545
autopkgtest

00:03:08

passed #356546
blhc

00:01:14

passed #356544
lintian

00:01:30

passed #356547
piuparts

00:03:38

passed #356543
reprotest

00:12:46

passed #356542
test-build-all

00:09:13

passed #356541
test-build-any

00:02:10