build error: 'pypandoc' has no attribute 'convert'

Hello, I'm building pawk on an Arch Linux machine with packages:
pawk v.0.7.0
pypandoc 1.8.1
The build process halts on the following error:
```
Traceback (most recent call last):
File "/home/gaetan/.cache/pikaur/build/python-pawk/src/pawk-0.7.0/setup.py", line 16, in
long_description = pypandoc.convert('README.md', 'rst')
AttributeError: module 'pypandoc' has no attribute 'convert'
```
I have also tried `pip install pawk` (pawk version is 0.6.5) and building git zip file with the same result.

Verification: the pypandoc I use has `convert_file` and `convert_text` methods, but no `convert`
```python:
>>> dir(pypandoc)
['DEFAULT_TARGET_FOLDER', 'Iterable', 'Union', '__all__', '__author__', '__author_email__', '__builtins__', '__cached__', '__classifiers__', '__description__', '__doc__', '__file__', '__license__', '__loader__', '__name__', '__package__', '__pandoc_path', '__path__', '__python_requires__', '__setup_requires__', '__spec__', '__url__', '__version', '__version__', '_as_unicode', '_check_log_handler', '_classify_pandoc_logging', '_convert_input', '_ensure_pandoc_path', '_get_base_format', '_get_pandoc_version', '_identify_format_from_path', '_identify_input_type', '_identify_path', '_is_network_path', '_validate_formats', 'absolute_import', 'cast_bytes', 'cast_unicode', 'clean_pandocpath_cache', 'clean_version_cache', 'convert_file', 'convert_text', 'download_pandoc', 'ensure_pandoc_installed', 'ensure_pandoc_maximal_version', 'ensure_pandoc_minimal_version', 'get_pandoc_formats', 'get_pandoc_formats_pre_1_18', 'get_pandoc_path', 'get_pandoc_version', 'glob', 'handler', 'logger', 'logging', 'normalize_format', 'os', 'pandoc_download', 'print_function', 'py3compat', 're', 'string_types', 'subprocess', 'sys', 'tempfile', 'textwrap', 'url2path', 'urlparse', 'with_statement']
>>>
```
I tried to use `convert_file` in place of `convert` but could not make `setup.py` run without error.