APPLIED: [PATCH][SRU][E] UBUNTU: [Packaging] Update sphinx build dependencies to python3 packages

[Seth Forshee]

On Sat, Sep 28, 2019 at 03:59:31PM -0500, Seth Forshee wrote:
> BugLink: https://bugs.launchpad.net/bugs/1845808
> 
> python2 is nearing eol and has been demoted to universe. Get rid
> of our last build dependency on python2 by switching to the
> python3 versions of the sphinx tools used for generating the html
> documentation.
> 
> Signed-off-by: Seth Forshee <seth.forshee at canonical.com>

Applied to eoan/master-next.