appveyor doesn't push code coverage

[rsyring]

==> Detecting CI provider
    AppVeyor Detected
    Fixing merge commit SHA
==> Preparing upload
    Error running `cd 'C:\projects\keg-6gnlh' && git ls-files`: None
==> Processing gcov (disable by -X gcov)
    Executing gcov (find 'C:\projects\keg-6gnlh' -not -path './bower_components/**' -not -path './node_modules/**' -not -path './vendor/**' -type f -name '*.gcno'  -exec gcov -pb  {} +)
    Error running `find 'C:\projects\keg-6gnlh' -not -path './bower_components/**' -not -path './node_modules/**' -not -path './vendor/**' -type f -name '*.gcno'  -exec gcov -pb  {} +`: None
==> Collecting reports
XX> Searching for reports disabled
Error: No coverage report found