Move Sphinx dependency out of package depedency

[Lawouach]

Signed-off-by: Sylvain Hellegouarch sh@defuze.org

• Link to issue this resolves

#16

• What I did

Moved the sphinx dependency to a new docs-requirements.txt

• How to verify it

$ python setup.py build
$ cat cloudevents.egg-info/requires.txt
pbr!=2.1.0,>=2.0.0

• One line description for the changelog

Remove Sphinx our of the package dependencies

[denismakogon]

thank you for your help, really.
would you mind to add a new requirements file into tox as well (see https://github.com/cloudevents/sdk-python/blob/master/tox.ini#L14)

[Lawouach]

Done. THough I don't fully understand why the build now fails.

[denismakogon]

CI fails because tox considers -r{toxinidir}/test-requirements.txt -r{toxinidir}/docs-requirements.txt as a single string and pep fails to find a path like that.
so, it has to be like this:

deps = -r{toxinidir}/test-requirements.txt 
       -r{toxinidir}/docs-requirements.txt

here's similar multiline definition https://github.com/cloudevents/sdk-python/blob/master/tox.ini#L6

[Lawouach]

Thanks. I wasn't aware of this.

Fixed now.

[denismakogon]

I'll make a release soon.

[denismakogon]

Done, look for 0.2.3