Added serializing into bytes object

[KOLANICH]

This PR requires tlwg/libdatrie#12 to be merged first (or maybe create an own fork of that lib, because that fork is inactive).

[KOLANICH]

@kmike, @jdufresne, @cclauss

[KOLANICH]

https://gitlab.com/KOLANICH-subgroups/packages/datrie/-/jobs/artifacts/master/raw/wheels/datrie-0.CI_python-py3-none-any.whl?job=build

[tacaswell]

@KOLANICH This requires a re-base.

[tacaswell]

Thank you, but we are still waiting on the PR (and release?) in libdatrie for this to be mergeable? What commit is the submodule pointing at now?

[KOLANICH]

I have sent there a PR, but when a PR is sent, GH puts the commits into the repo (proof), so submodules should work even if that PR is not merged yet.

[tacaswell]

if the PR gets closed without being merged or you change the PR (either by just adding more commits or by force-pushing new commits) what will make sure the commit we are relying on here does not get "garbage collected" by github?

[KOLANICH]

If it is your concern, you can fork that repo and fetch the branch from mine. I don't want to tie this project to my fork of that repo because I plan to delete it as soon as everything I need merged.

[tacaswell]

The upstream PR still appears to not be merged?

[KOLANICH]

@tacaswell, it's merged into the upstream.

[KOLANICH]

@tacaswell

[KOLANICH]

@tacaswell

[KOLANICH]

@tacaswell