chore(ci): drop node 9 from travis tests (#3100)
chore(ci): drop node 9 from travis tests (#3100)


johnjbarton/karma,karma-runner/karma,maksimr/karma,karma-runner/karma,maksimr/karma,karma-runner/karma,johnjbarton/karma,maksimr/karma,david-garcia-nete/karma,karma-runner/karma,david-garcia-nete/karma,johnjbarton/karma,johnjbarton/karma,david-garcia-nete/karma