Fix false positive when running test.sh (#212)
Fix false positive when running test.sh (#212)

Patch #193 introduced a regression in the toml-tests examples, but it was
never caught because test.sh was exiting with a zero status code, even
though the tests failed. This is because of the `|tee` operation when
invoking toml-test, without setting the pipefail option, reporting the
status code of `tee` instead of `toml-test`.
pelletier/go-toml,pelletier/go-toml