Issue 483

[abravalheri]

This PR should fix #483. As described in the issue the solution proposed is to use isolated_build also for docs tasks with tox.

It seems that recent versions of tox just accept the isolated_build option as a global config and not per-environment, which is consistent with their most updated docs.

[coveralls]

Pull Request Test Coverage Report for Build 5735333649186816

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.09%) to 97.187%

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Files with Coverage Reduction	New Missed Lines	%
src/pyscaffold/update.py	1	94.83%

Totals
Change from base Build 6402458940342272:	-0.09%
Covered Lines:	1629
Relevant Lines:	1662

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💛 - Coveralls

[FlorianWilhelm]

Cool! Thanks, @abravalheri