Add wheel to dependencies

[AlexBlandin]

This and Weasyprint need https://pypi.org/project/wheel/ added as a pip requirement along with setuptools, as cairocffi uses bdist_wheel in setup, and wheel doesn't seem to be included by setuptools by default.

[AlexBlandin]

Not sure if this is related to https://bugs.python.org/issue37481, which depracated bdist_wininst in 3.8, specifically on Windows?

[AlexBlandin]

So this is primarily a problem on setuptools's end, however including wheel as a dependency in the documentation is probably the path of least resistence to avoid setuptools related issues given its recent deprecations (including easy_install).

[liZe]

So this is primarily a problem on setuptools's end, however including wheel as a dependency in the documentation is probably the path of least resistance.

If it works, including it in dependencies would be even better.

[HenryMehta]

This is also a problem when trying to load into AWS ElasticBeanstalk. You get the following error:

Collecting cairocffi==1.1.0 (from -r /opt/python/ondeck/app/requirements.txt (line 11))
    Downloading https://files.pythonhosted.org/packages/f7/99/b3a2c6393563ccbe081ffcceb359ec27a6227792c5169604c1bd8128031a/cairocffi-1.1.0.tar.gz (68kB)
    Running setup.py (path:/tmp/pip-build-uprtf2s9/cairocffi/setup.py) egg_info for package cairocffi produced metadata for project name unknown. Fix your #egg=cairocffi fragments.

[liZe]

Closing #141 would close this issue too, let’s keep one thread of comments in #141.