Improve epub support

10 jobs for epubplus in 1 minute and 47 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Linting
passed #185419
linting:bandit

00:00:10

passed #185420
linting:codespell

00:00:11

passed #185423
linting:mypy

00:00:12

passed #185422
linting:pyflakes

00:00:10

passed #185421
linting:pylint

00:00:22

 
  Test
passed #185424
tests:archlinux

00:01:05

passed #185425
tests:debian

00:01:04

failed #185426
tests:debian_with_bubblewrap

00:00:35

passed #185427
tests:fedora

00:01:07

passed #185428
tests:gentoo

00:01:21

 
Name Stage Failure
failed
tests:debian_with_bubblewrap Test

----------------------------------------------------------------------
Ran 119 tests in 24.392s

FAILED (failures=6, errors=36)
[+] Testing pdf
[+] Testing png
Cleaning up file based variables
ERROR: Job failed: exit code 1