breakages in travis-ci and ci.appveyor

I am using Matthew Brett's manylinux builder setup (https://github.com/matthew-brett/multibuild) for reportlab and just started to 
see this

> File "/opt/_internal/cpython-3.6.6/lib/python3.6/site-packages/auditwheel/wheeltools.py", line 14, in <module>
>     from wheel.util import urlsafe_b64encode, open_for_csv, native  # type: ignore
> ImportError: cannot import name 'open_for_csv'


at the same time my appveyor builds have started to fail with this

> c:\Python%PYTHON%\scripts\pip.exe --version
> pip 18.0 from c:\python34\lib\site-packages\pip (python 3.4)
> c:\Python%PYTHON%\scripts\pip.exe install wheel
> Collecting wheel
>   Using cached https://files.pythonhosted.org/packages/b3/bb/42354ce8c08f66ae0cd0f4a841f40ed41d709ac9c28f292bfeb383236a4a/wheel-0.32.0-py2.py3-none-any.whl
> Installing collected packages: wheel
> Successfully installed wheel-0.32.0
> c:\Python%PYTHON%\python.exe -W ignore setup.py bdist_wheel
> ================================================
> Attempting build of _rl_accel & pyHnj
................
>  File "c:\Python34\lib\site-packages\wheel\bdist_wheel.py", line 237, in run
>     self.egg2dist(self.egginfo_dir, distinfo_dir)
>   File "c:\Python34\lib\site-packages\wheel\bdist_wheel.py", line 344, in egg2dist
>     pkg_info = pkginfo_to_metadata(egginfo_path, pkginfo_path)
>   File "c:\Python34\lib\site-packages\wheel\metadata.py", line 88, in pkginfo_to_metadata
>     for key, value in generate_requirements({extra: reqs}):
>   File "c:\Python34\lib\site-packages\wheel\metadata.py", line 67, in generate_requirements
>     for new_req in convert_requirements(depends):
>   File "c:\Python34\lib\site-packages\wheel\metadata.py", line 36, in convert_requirements
>     spec = requires_to_requires_dist(parsed_requirement)
>   File "c:\Python34\lib\site-packages\wheel\metadata.py", line 21, in requires_to_requires_dist
>     if requirement.url:
> AttributeError: 'Requirement' object has no attribute 'url'
> Command exited with code 1

I assume these are related to wheel changes just announced. Certainly the multibuild docker was updated to use 0.32.0

I'm not sure if I have to do something or how I can fix this.
-- 
Robin Becker
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