please update sphinx dependency from ancient v1.3.1 #130
Description
The latest release of qibuild v3.13 (available from PyPi but for some reason the Github releases have not been updated since 3.11.17 on September 25th, 2017) still requires sphinx version 1.3.1 or less
setup.py : "sphinx<=1.3.1"
This version of sphinx was released over 4 years ago on March 17, 2015, and sphinx is now up to version 2.2.1. Even the Ubuntu 18.04 LTS distribution provides the newer sphinx 1.3.6 of February 29, 2016.
Please consider updating the Sphinx version requirement (and its related dependencies) to a newer version so that ancient obsolete dependent versions no longer have to be installed in order to install qibuild.