[MNT] Relax numpy bound to numpy<3.0.0

[XinyuWuu]

Relaxes numpy bound to numpy<3.0.0.

(updated by @fkiraly - removed the optuna bound which has been dealt with in #1629)

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It should work with newer numpy and optuna version after #1599.

[XinyuWuu]

numpy2 support of torch: pytorch/pytorch#107302 (comment)

macOS x86 builds / test deprecation: pytorch/pytorch#114602

It seems impossible to have numpy2 and torch working in macOS x86.

[fkiraly]

Why is this not a problem in the sktime runners, where we have torch models and also an OS matrix?

[XinyuWuu]

Why is this not a problem in the sktime runners, where we have torch models and also an OS matrix?

Actully we are having torch 2.2.2 and numpy 1.24 for macos in sktime.

[fkiraly]

do you know what causes that? because for sure we have numpy 2 on most jobs (right?)

[XinyuWuu]

do you know what causes that? because for sure we have numpy 2 on most jobs (right?)

pytorch has deprecated macOS x86 after version 2.2.2, but torch 2.2.2 do not suppurt numpy2.

[fkiraly]

I see, so we are forced torch <2.2 because we enforce numpy 2, am I understanding correctly?

[XinyuWuu]

I see, so we are forced torch <2.2 because we enforce numpy 2, am I understanding correctly?

We are forced numpy 1 because we are forced torch<=2.2.2. We can not install torch>2.2.2 in macOS x86 because pytorch has deprecated it after 2.2.2. We can not support numpy 2 in macOS x86 because pytorch supports numpy 2 only with torch>=2.3.0 which can not be installed in macOS x86.