bug#27110: [PATCH] gnu: asciinema: Update to 1.4.0.

[Arun Isaac]

> In my experience, it seems like the PyPi tarballs are what the upstream
> projects want distributors to use.
>
> So, I usually use what's on PyPi, but it depends.

By preferring pypi, I worry that we promote a kind of centralization. In
my romanticized vision for the future, I see every one self-hosting
their own servers, serving code for their projects, and guix pulling and
building from all of them. This is why I find excessive dependence on
pypi disturbing. We are also creating a single point of failure/attack
at pypi. Granted that everyone using github to host their projects is
not much better, still...