Add support for NumPy 2.0.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.10%. Comparing base (cb6b604) to head (41994a3). Report is 40 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #681 +/- ## ========================================== - Coverage 90.21% 90.10% -0.11% ========================================== Files 20 22 +2 Lines 3670 3731 +61 ========================================== + Hits 3311 3362 +51 - Misses 359 369 +10 ```

[hameerabbasi]

Shouldn't we merge it once NumPy 2.0(rc) is ran in the --pre job?

In logs I see that it's still 1.x: https://github.com/pydata/sparse/actions/runs/9125700838/job/25092447467?pr=681#step:6:160

Installing collected packages: numpy, llvmlite, numba
  Attempting uninstall: numpy
    Found existing installation: numpy 1.26.4
    Uninstalling numpy-1.26.4:
      Successfully uninstalled numpy-1.26.4
  Attempting uninstall: llvmlite
    Found existing installation: llvmlite 0.42.0
    Uninstalling llvmlite-0.42.0:
      Successfully uninstalled llvmlite-0.42.0
  Attempting uninstall: numba
    Found existing installation: numba 0.59.1
    Uninstalling numba-0.59.1:
      Successfully uninstalled numba-0.59.1

It doesn't add/test support for NumPy 2.0 yet.

Right -- we first install 1.x and then update. You're seeing the lines for the initial install: https://github.com/pydata/sparse/actions/runs/9125700838/job/25092447467?pr=681#step:6:171

Successfully installed llvmlite-0.43.0rc1 numba-0.60.0rc1 numpy-2.0.0rc2