Revert "Skip AppVeyor builds on non-code changes"
Revert "Skip AppVeyor builds on non-code changes"

xavfernandez/pip,pypa/pip,pypa/pip,rouge8/pip,pfmoore/pip,xavfernandez/pip,techtonik/pip,rouge8/pip,pradyunsg/pip,techtonik/pip,sbidoul/pip,techtonik/pip,rouge8/pip,sbidoul/pip,xavfernandez/pip,pfmoore/pip,pradyunsg/pip