fix: compat with old numpy

[jokasimr]

Fixes the nightly lower bound tests.

[jl-wynen]

Scipp requires numpy >=2. So there is no need to try and support anything older here. I am surprised this works at all in CI. But I am not confident that the C++ bindings can fully support numpy 1.

[jokasimr]

Oh I see, good to know

[jokasimr]

Scipp requires numpy >=2.

I'm surprised the pin in scipp does not make the environment resolve to numpy>=2.0 automatically.

[jl-wynen]

Scipp requires numpy >=2.

I'm surprised the pin in scipp does not make the environment resolve to numpy>=2.0 automatically.

That happens because we use --resolution=lowest-direct, not lowest.

[jokasimr]

That happens because we use --resolution=lowest-direct, not lowest.

👍 Should we change it?

[jl-wynen]

I don't think so. The tests are meant to check the package itself, not its dependencies. And packages should not rely on transitive dependencies

[jokasimr]

That makes sense.