fix scipy version for py38 build

pyproject.toml

@@ -3,9 +3,10 @@ requires = [
     "setuptools>=64",
     "setuptools_scm>=7",
     "numpy>=2.0.0rc1,<2.3; python_version >= '3.9'",
+    "scipy>=1.13.0,<2; python_version >= '3.9'",
     "oldest-supported-numpy; python_version < '3.9'",
+    "scipy>=1.3.2,<2; python_version < '3.9'",
     "Cython>=3.0.10,<3.1.0",
-    "scipy>=1.13.0,<2",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -154,10 +155,8 @@ max-line-length = 100
 [tool.cibuildwheel]
 # Switch to using build
 build-frontend = "build"
-# Disable building PyPy wheels on all platforms, 32bit for py3.10/11/12 and musllinux builds, py3.6/7
+# Disable building PyPy wheels on all platforms, 32bit and musllinux builds, py3.6/7
 skip = ["cp36-*", "cp37-*", "pp*", "*-win32", "*-manylinux_i686", "*-musllinux_*"]
 # Run the package tests using `pytest`
 test-extras = "test"
 test-command = "pytest -v {package}/tests"
-# Skip trying to test arm64 builds on Intel Macs
-test-skip = "*-macosx_arm64 *-macosx_universal2:arm64"