Optimisation of apt update

[Flashwalker]

Added two functions: update_repo and update_ppa to optimize apt update

[philclifford]

This fixes #428

[Flashwalker]

Please rebase with main.

rebase and push? or you are meen you merged it and now i can pull it from your main branch? or what? Sorry, my git pr skills leave a lot to be desired

[natanjunges]

If you go to your branch page in GitHub, you will see it is "3 commits ahead, 10 commits behind" the main branch (or something similar). It needs to get caught up with the main branch (the 10 commits it is behind), so the permission error the test workflow is complaining about gets fixed. If there are no merging conflicts, it should be pretty simple, just click on "Sync fork", and then on the green button that appears. If a red button appears instead, do not click on it, as it would wipe out all of your contributions. In this case, the merge conflicts would have to be resolved locally using the command line.

[Flashwalker]

If you go to your branch page in GitHub, you will see it is "3 commits ahead, 10 commits behind"...

Ok, done. Now it's just: "4 commits ahead"

[Flashwalker]

Github suggested me to discard 4 commits. Not sure it was right, but done

[natanjunges]

You should not have discarded them, as they were your contributions. Please recommit them and reopen this PR.

[Fuseteam]

oh dear, i'm not sure if they know how to do that

[Flashwalker]

oh dear, i'm not sure if they know how to do that

I'd better make a new PR

[Flashwalker]

new PR: https://github.com/wimpysworld/deb-get/pull/657