Revert "ci/travis: Remove top-level unneeded language statement"
Revert "ci/travis: Remove top-level unneeded language statement"

This is required to avoid the worker to default to "ruby"

This reverts commit 0e889ddff1b765912ee02da6ffc00305936353c9.

scikit-build/scikit-ci-addons,scikit-build/scikit-ci-addons