update date in .gemspec
update date in .gemspec

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