[ERROR] AttributeError: module 'typing' has no attribute '_ClassVar'
Traceback (most recent call last):
  File "/var/lang/lib/python3.8/imp.py", line 234, in load_module
    return load_source(name, filename, file)
  File "/var/lang/lib/python3.8/imp.py", line 171, in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>", line 702, in _load
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/var/task/lambda_handler.py", line 9, in <module>
    from cvedb.db import CVEdb
  File "/opt/python/cvedb/__init__.py", line 13, in <module>
    module = import_module(f"{__name__}.{module_name}")
  File "/var/lang/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/opt/python/cvedb/cli.py", line 8, in <module>
    from .cpe import Logical
  File "/opt/python/cvedb/cpe.py", line 152, in <module>
    class CPE(Testable):
  File "/opt/python/dataclasses.py", line 950, in wrap
    return _process_class(cls, init, repr, eq, order, unsafe_hash, frozen)
  File "/opt/python/dataclasses.py", line 800, in _process_class
    cls_fields = [_get_field(cls, name, type)
  File "/opt/python/dataclasses.py", line 800, in <listcomp>
    cls_fields = [_get_field(cls, name, type)
  File "/opt/python/dataclasses.py", line 659, in _get_field
    if (_is_classvar(a_type, typing)
  File "/opt/python/dataclasses.py", line 550, in _is_classvar
    return type(a_type) is typing._ClassVar