Adds support for the "type" keyword in Python 3.12+

[emorozov]

flake8-expression-complexity fails on newer code that defines type aliases using type keyword:

TypeAlias(
    lineno=1,
    col_offset=0,
    end_lineno=1,
    end_col_offset=15,
    name=Name(lineno=1, col_offset=5, end_lineno=1, end_col_offset=9, id='uint', ctx=Store()),
    type_params=[],
    value=Name(lineno=1, col_offset=12, end_lineno=1, end_col_offset=15, id='int', ctx=Load()),
)
Traceback (most recent call last):
  File "/home/jmv/tmp/flake/.venv/bin/flake8", line 10, in <module>
    sys.exit(main())
             ~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/main/cli.py", line 23, in main
    app.run(argv)
    ~~~~~~~^^^^^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/main/application.py", line 198, in run
    self._run(argv)
    ~~~~~~~~~^^^^^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/main/application.py", line 187, in _run
    self.run_checks()
    ~~~~~~~~~~~~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/main/application.py", line 103, in run_checks
    self.file_checker_manager.run()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/checker.py", line 237, in run
    self.run_serial()
    ~~~~~~~~~~~~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/checker.py", line 220, in run_serial
    ).run_checks()
      ~~~~~~~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/checker.py", line 526, in run_checks
    self.run_ast_checks()
    ~~~~~~~~~~~~~~~~~~~^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8/checker.py", line 428, in run_ast_checks
    for line_number, offset, text, _ in runner:
                                        ^^^^^^
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8_expression_complexity/checker.py", line 46, in run
    complexity = get_expression_complexity(expression)
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8_expression_complexity/utils/complexity.py", line 66, in get_expression_complexity
    info = get_expression_part_info(node)
  File "/home/jmv/tmp/flake/.venv/lib/python3.13/site-packages/flake8_expression_complexity/utils/complexity.py", line 114, in get_expression_part_info
    raise AssertionError('should always get node type')
AssertionError: should always get node type

This PR fixes the error.

[emorozov]

@korneevm @krepysh @Melevir
Guys, is this project alive? Does it make sense to use it and/or support it?

[krepysh]

@OdintsovTim 👀