2023-11-01

• Compatibility with Python 3.13

• Fix segmentation fault by forgetting objects on library unloading.
  Observed on Fedora Rawhide with address randomization,
  reported by Jerry James,
  #85

• #93, #94: Fix Py.Object.get_attr_string: this function now returns
  None when attribute is missing (the former version raised an
  exception, despite the option return type and contrary to what was
  documented).
  Reported by Lindsay Errington, @dlindsaye,
  #93

• #91, #92, #94: Better search heuristics for python library.
  Suggested by camlspotter and Et7f3.
  Use of python-config.
  Use of otool -L instead of ldd on Mac OS X.
  #91
  #92

• #96: find functions (Py.Object.find, Py.Object.find_string,
  Py.Dict.find, Py.Dict.find_string, Py.Object.find_attr_string
  and Py.Object.find_attr) now consistently fail with Not_found
  exception, as it is said in the documentation. Functions
  Py.Object.find_err, Py.Object.find_string_err,
  Py.Object.find_attr_err, Py.Object.find_attr_string_err have
  been introduced for cases where keeping the underlying Python
  exception is preferable. For instance, Py.Module.get is now an
  alias for Py.Object.find_attr_string_err to keep the current
  behavior of failing with a Python exception.
  Reported by Jonathan Laurent,
  #96