Pin numpy<2

[Wh1isper]

Description

Motivation and Context

How has this been tested?

Types of changes

• Maintenance (no change in code, maintain the project's CI, docs, etc.)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[Wh1isper]

@MooooCat numpy v2 is not compatible with the project, see this action: https://github.com/hitsz-ids/synthetic-data-generator/actions/runs/9567909279?pr=190

We may wait for numpy v2 to be more stable and compatible before we consider upgrading.

[Wh1isper]

@MooooCat I think we may need to do a release(0.2.1) to include this change so that downstream users will not install numpy v2 due to pip's strategy.