[SWE] Fix NumPy 2.0 compliance.

Pyxu does not yet support v2.0, but we fix these issues now in anticipation of the release.

info: https://numpy.org/devdocs/numpy_2_0_migration_guide.html#numpy-2-0-migration-guide

dev/todo.txt

@@ -1,3 +1,8 @@
+NumPy 2.0 Migration
+    To be done when min supported version becomes 2.0:
+        pyxu.operator.interop.jax.py
+            xp.byte_bounds() -> xp.lib.array_utils.byte_bounds()
+
 doc/
     api/ has/is-being updated to ND API interactively.
 

src/pyxu/math/cluster.py

@@ -97,7 +97,7 @@ def bisect_cluster(
     def _bisect(x_idx: np.ndarray) -> ClusterMapping:
         # Split point cloud
         _x = x[x_idx]
-        bbox_dim = _x.ptp(axis=0) / 2
+        bbox_dim = np.ptp(_x, axis=0) / 2
         _clusters = grid_cluster(_x, bbox_dim)
 
         # re-label output indices

src/pyxu/operator/linop/fft/nufft.py

@@ -1164,8 +1164,8 @@ def _partition_domain(
         N, v_cl = len(v), {0: slice(None)}
         if chunked and (M > 1) and (N > 1):
             x_bbox_dim, v_bbox_dim = NUFFT3._infer_bbox_dims(
-                x_ptp=x.ptp(axis=0),
-                v_ptp=v.ptp(axis=0),
+                x_ptp=np.ptp(x, axis=0),
+                v_ptp=np.ptp(v, axis=0),
                 upsampfac=upsampfac,
                 domain=domain,
                 max_fft_mem=max_fft_mem,