Fix TypeError when using Pyproject.toml

[jonathangreen]

Found this error when using the first override in a pyproject.toml file. It was happening because tomlkit wrappers were making it into the configuration, causing the dataclass not to be serialize to a dict.

Traceback (most recent call last):
  File "/bin/toml-sort", line 8, in <module>
    sys.exit(cli())
  File "/toml_sort/cli.py", line 413, in cli
    sorted_toml = TomlSort(
  File "/toml_sort/tomlsort.py", line 810, in sorted
    sorted_toml = self.toml_doc_sorted(toml_doc)
  File "/toml_sort/tomlsort.py", line 796, in toml_doc_sorted
    self.toml_elements_sorted(item, sorted_document),
  File "/toml_sort/tomlsort.py", line 611, in toml_elements_sorted
    self.toml_elements_sorted(item, previous_item),
  File "/toml_sort/tomlsort.py", line 611, in toml_elements_sorted
    self.toml_elements_sorted(item, previous_item),
  File "/toml_sort/tomlsort.py", line 604, in toml_elements_sorted
    for item in self.sorted_children_table(
  File "/toml_sort/tomlsort.py", line 542, in sorted_children_table
    sort_config = self.sort_config(parent_keys)
  File "/toml_sort/tomlsort.py", line 336, in sort_config
    override_config = asdict(override)
  File "dataclasses.py", line 1075, in asdict
    return _asdict_inner(obj, dict_factory)
  File "dataclasses.py", line 1082, in _asdict_inner
    value = _asdict_inner(getattr(obj, f.name), dict_factory)
  File "dataclasses.py", line 1110, in _asdict_inner
    return type(obj)(_asdict_inner(v, dict_factory) for v in obj)
TypeError: __init__() missing 1 required positional argument: 'trivia'

Added a test to check that the types we get out of the config are plain old python objects and fixed this issue.

[jonathangreen]

This is what I had in my pyproject.toml that was triggering the error for me:

[tool.tomlsort.overrides]
"tool.poetry.dependencies".first = ["python"]

[pappasam]

🚀