[PATCH 4/7] travis: run pep8/flake8 tests

[Stephen Finucane]

On Thu, 2018-01-25 at 13:43 +1100, Daniel Axtens wrote:
> Add the test at the end of each run. This is inefficient but simpler
> than adding a matrix entry. It's also very fast so there's no
> slowdown.
> 
> While there, remove the 'codecov' package: tox will bring it in
> automatically.
> 
> Signed-off-by: Daniel Axtens <dja at axtens.net>

I think we can optimize this slightly, but this will do for now.

Reviewed-by: Stephen Finucane <stephen at that.guru>