Unpin scipy upper version limit

Rationale:  It works fine with 1.13 and with have no indication that something will break with the next minor versions (and no major version bump in sight)

setup.cfg

@@ -8,7 +8,7 @@ python_requires = >=3.9
 
 install_requires =
     numpy >= 1.19.5
-    scipy >= 1.10.1, < 1.13.0
+    scipy >= 1.10.1
     cython >= 3.0.7
     nose-py3 >= 1.6.3
     matplotlib > 3