TimezoneInfo cannot be deepcopied

[AndreasBackx]

When converting a Pendulum class to a datetime object, it still keeps the tzinfo of the type TimeZoneInfo of the Pendulum object. Then when trying to deepcopy that, it raises the TypeError seen below.

from copy import deepcopy

import pendulum

pd = pendulum.parse('2017-07-11 17:19:18.686028+02:00')
dt = pd._datetime

deepcopy(pd)
deepcopy(dt)  # TypeError raised here.

Traceback

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 182, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 291, in _reconstruct
    args = deepcopy(args, memo)
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 155, in deepcopy
    y = copier(x, memo)
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 223, in _deepcopy_tuple
    y = [deepcopy(a, memo) for a in x]
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 223, in <listcomp>
    y = [deepcopy(a, memo) for a in x]
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 182, in deepcopy
    y = _reconstruct(x, rv, 1, memo)
  File "/home/andreas/.pyenv/versions/project/lib/python3.5/copy.py", line 292, in _reconstruct
    y = callable(*args)
TypeError: __init__() missing 5 required positional arguments: 'tz', 'utc_offset', 'is_dst', 'dst', and 'abbrev'

I found this bug because of another issue I made: romgar/django-dirtyfields#101.

This was tested on Pendulum 1.2.4 and Python 3.5.3.