Review feedback on #2878. stdout is async when it is a pipe, which is exactly
how tests/run-all.js runs these files, and process.exit() does not wait for
pending writes — so exiting that way can drop the Passed:/Failed: lines the
aggregator totals, defeating the previous commit. The sibling
tests/ci/ito-*-skill.test.js files already use process.exitCode.
Still exits 1 on a broken counter (Passed: 4, Failed: 7) and 0 when clean.
Nguyen Thanh Dat
e3ab97915f