BLD: Build against numpy >= 2.0.0rc1

This unpins numpy<2 and builds the SWIG C library against numpy >=
2.0.0rc1. Versions of numpy major 2 are backward compatible with numpy
1. Hence we should not see issues in environment where numpy<2 may be
maintained for years to come, i.e. RMS environments.

The numpy SWIG bindings committed in this repository are not out-of-date
in a way that would break compatibility. The last update to them in
numpy's repository was two years ago from the time of this commit.

pyproject.toml

@@ -3,11 +3,7 @@ requires = [
     "pybind11",
     "scikit-build-core[pyproject]>=0.10",
     "swig",
-    "numpy==1.19.2; python_version == '3.8'",
-    "numpy==1.19.5; python_version == '3.9'",
-    "numpy==1.21.6; python_version == '3.10'",
-    "numpy==1.23.5; python_version == '3.11'",
-    "numpy==1.26.2; python_version == '3.12'",
+    "numpy>=2.0.0rc1",
 ]
 build-backend = "scikit_build_core.build"
 
@@ -53,7 +49,7 @@ dependencies = [
     "hdf5plugin>=2.3",
     "joblib",
     "matplotlib>=3.3",
-    "numpy<2",
+    "numpy",
     "pandas>=1.1",
     "resfo>=4.0.0",
     "roffio>=0.0.2",

tests/test_grid3d/test_grid_property.py

@@ -116,7 +116,7 @@ def test_assign():
     # this shall now broadcast the value 33 to all activecells
     x.isdiscrete = True
     x.values = 33
-    assert x.dtype == np.int32
+    assert x.dtype == np.int64
 
     x.isdiscrete = False
     x.values = 44.0221