Update Debian Compatibility Level

[meetgandhi-dev]

This commit updates the Debian compatibility level to adhere to the recommendations outlined in the Debian documentation: https://www.debian.org/doc/manuals/maint-guide/dother.en.html#compat

This change resolves the following warning generated by debhelper:

dh: warning: Compatibility levels before 10 are deprecated (level 9 in use)

Additionally, the conditional value for Ubuntu Oneiric has been removed, as the latest version no longer requires it.

[meetgandhi-dev]

Hey @cottsay ,
Request to merge this PR: it contains a small update to the Debian compatibility level!

[cottsay]

There is quite a lot of conversation about bumping this in #643 already. Does this PR address any of the concerns discussed there?

[meetgandhi-dev]

@cottsay The purpose of this PR is to address the compat level, as the current version we are using has been deprecated as noted here. This change will enable parallel builds, as outlined here. However, if parallel builds are not required, I am happy to update the PR to disable this feature.

[christianrauch]

@meetgandhi-dev Your PR is clearly a duplicate of #643, which was opened in July 2021 and raises the debhelper_version to 11. Do you see any reason to keep your PR, which raises that only to 10, open? I would propose to close your PR in order to channel the discussion to #643. From there, you can already see that the rough plan is to increase the debhelper_version to 13 once Ubuntu 20.04 is out of support (end of May 2025).

[meetgandhi-dev]

sure.