JSF fails on Python 3.14

[RobbeSneyders]

On Python 3.14, the following error is raised when generating an example:

  connexion/utils.py:546: in build_example_from_schema
      return faker.generate()
             ^^^^^^^^^^^^^^^^
  .tox/py314-pypi/lib/python3.14/site-packages/jsf/parser.py:353: in generate
      context = {**self.context, "use_defaults": use_defaults, "use_examples": use_examples}
                   ^^^^^^^^^^^^
  .tox/py314-pypi/lib/python3.14/site-packages/jsf/parser.py:340: in context
      return {**self.base_context, "state": deepcopy(self.base_state)}
                                            ^^^^^^^^^^^^^^^^^^^^^^^^^
  /opt/hostedtoolcache/Python/3.14.0/x64/lib/python3.14/copy.py:131: in deepcopy
      y = copier(x, memo)
          ^^^^^^^^^^^^^^^
  /opt/hostedtoolcache/Python/3.14.0/x64/lib/python3.14/copy.py:202: in _deepcopy_dict
      y[deepcopy(key, memo)] = deepcopy(value, memo)
                               ^^^^^^^^^^^^^^^^^^^^^
  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
  
  x = count(1), memo = {140453082250240: {}}, _nil = []
  
      def deepcopy(x, memo=None, _nil=[]):
          """Deep copy operation on arbitrary Python objects.
      
          See the module's __doc__ string for more info.
          """
      
          cls = type(x)
      
          if cls in _atomic_types:
              return x
      
          d = id(x)
          if memo is None:
              memo = {}
          else:
              y = memo.get(d, _nil)
              if y is not _nil:
                  return y
      
          copier = _deepcopy_dispatch.get(cls)
          if copier is not None:
              y = copier(x, memo)
          else:
              if issubclass(cls, type):
                  y = x # atomic copy
              else:
                  copier = getattr(x, "__deepcopy__", None)
                  if copier is not None:
                      y = copier(memo)
                  else:
                      reductor = dispatch_table.get(cls)
                      if reductor:
                          rv = reductor(x)
                      else:
                          reductor = getattr(x, "__reduce_ex__", None)
                          if reductor is not None:
  >                           rv = reductor(4)
                                   ^^^^^^^^^^^
  E                           TypeError: cannot pickle 'itertools.count' object
  
  /opt/hostedtoolcache/Python/3.14.0/x64/lib/python3.14/copy.py:146: TypeError

This is caused by itertools.count objects no longer being picklable since Python 3.14:
https://docs.python.org/3/whatsnew/3.14.html#itertools
python/cpython#118816
python/cpython#101588