Asyncio functions not parsed

[EEsDoNotItNow]

Bug

Coroutines (functions with the prefix async), as introduced by the asyncio module, are not parsed.

Test Version

Python 3.6.4 using pipenv to manage a virtual environment. doxypypy==0.8.8.6, as installed by pipenv with pipenv install doxypypy Failure can be reproduced without the need for Doxygen.

Reproduction

• Modify the example code by prefixing async to make the function be a coroutine.
• Run doxypypy -a -c example.py, targeting the example file.
• Code is perfectly valid python 3.5+ code, but is not parsed.
• Cry that you cannot use this cool piece of software.

async def myfunction(arg1, arg2, kwarg='whatever.'):
    """
    Does nothing more than demonstrate syntax.

    This is an example of how a Pythonic human-readable docstring can
    get parsed by doxypypy and marked up with Doxygen commands as a
    regular input filter to Doxygen.

    Args:
        arg1:   A positional argument.
        arg2:   Another positional argument.

    Kwargs:
        kwarg:  A keyword argument.

    Returns:
        A string holding the result.

    Raises:
        ZeroDivisionError, AssertionError, & ValueError.

    Examples:
        >>> myfunction(2, 3)
        '5 - 0, whatever.'
        >>> myfunction(5, 0, 'oops.')
        Traceback (most recent call last):
            ...
        ZeroDivisionError: integer division or modulo by zero
        >>> myfunction(4, 1, 'got it.')
        '5 - 4, got it.'
        >>> myfunction(23.5, 23, 'oh well.')
        Traceback (most recent call last):
            ...
        AssertionError
        >>> myfunction(5, 50, 'too big.')
        Traceback (most recent call last):
            ...
        ValueError
    """
    assert isinstance(arg1, int)
    if arg2 > 23:
        raise ValueError
    return '{0} - {1}, {2}'.format(arg1 + arg2, arg1 / arg2, kwarg)```

[Feneric]

Fixed.