Support for NumPy 2.x

[censeon]

Thank you for all the effort you put into maintaining and improving this project – it’s incredibly valuable to the community!

I noticed that when installing VectorBT, the process automatically downgrades NumPy from version 2.x to 1.x. Since NumPy 2.x is now widely adopted and introduces significant improvements, I wanted to kindly ask whether support for NumPy 2.x is planned for an upcoming release.

Steps to Reproduce:

• Start with a clean environment.
• Install the latest version of NumPy (e.g., pip install numpy>=2.1.3).
• Install VectorBT (e.g., pip install vectorbt).

Expected Behavior:
VectorBT installs successfully and retains NumPy 2.x compatibility.

Actual Behavior:
Installing VectorBT results in NumPy being downgraded to 1.x.

Environment:
Python Version: 3.12.3
NumPy Version: 2.1.3 before installation; downgraded to 1.x after.
OS: Ubuntu 24.04

Questions/Requests:
Are there plans to add support for NumPy 2.x in future releases?

Thank you so much for your time and effort. I greatly appreciate the work you do and look forward to any updates or guidance you can provide.