chore: fix setting of rubocop in travis setting file
chore: fix setting of rubocop in travis setting file

masawada/review,takahashim/review,krororo/review,krororo/review,suzuki/review,kuad9/review_study,suzuki/review,murashitas/review,kmuto/review,murashitas/review,kmuto/review,masawada/review,kmuto/review,takahashim/review,kuad9/review_study,krororo/review,orangain/review,orangain/review