message: Use np.sctypeDict instead of np.typeDict to fix crash under NumPy 1.21.
  I'm unsure why this crashes instead of just producing a warning, but typedict is a deprecated name (https://numpy.org/devdocs/release/1.21.0-notes.html#np-typedict-has-been-formally-deprecated) and apparently has been for 14 years.
  (although it seems likely the same issue applies to TF also)
diff: @@ -1354,7 +1354,7 @@ bool Initialize() {
  }
  Safe_PyObjectPtr typeDict_obj =
  - make_safe(PyObject_GetAttrString(numpy.get(), "typeDict"));
  + make_safe(PyObject_GetAttrString(numpy.get(), "sctypeDict"));
  if (!typeDict_obj) return false;
  // Add the type object to `numpy.typeDict`: that makes
  // `numpy.dtype('bfloat16')` work.
  