travis: drop node 11 testing (#2692)
travis: drop node 11 testing (#2692)


smfreegard/Haraka,haraka/Haraka,haraka/Haraka,msimerson/Haraka,haraka/Haraka,smfreegard/Haraka,smfreegard/Haraka,msimerson/Haraka,smfreegard/Haraka,haraka/Haraka,msimerson/Haraka,msimerson/Haraka