Use pmbootstrap 2.3.x

The tests don't work with pmb v3 yet, see #9 (closed).

added 3 commits

• de6a328e - test_upstream_compat: drop test_qt_versions (MR 15)
• a961eaca - editorconfig: don't indent py files with tabs (MR 15)
• f6d2ead4 - test_upstream_compat_setup: use pmbootstrap 2.3.x (MR 15)

Compare with previous version

enabled an automatic merge when all merge checks for f6d2ead4 pass

merged

mentioned in issue postmarketos#77