Fix failing tests - RuntimeError: Not a datatype (not a datatype) (#2979)

* Fix failing macos tests - `RuntimeError: Not a datatype (not a datatype)`

Require `h5py!=3.15`.

* all platforms

Author: dweindl

python/sdist/pyproject.toml

@@ -63,7 +63,7 @@ classifiers = [
 petab = ["petab>=0.4.0"]
 pysb = ["pysb>=1.13.1"]
 test = [
-    "h5py",
+    "h5py!=3.15",
     "pytest",
     "pytest-cov",
     # v16.0: https://github.com/pytest-dev/pytest-rerunfailures/issues/302