format .travis.yml correctly
format .travis.yml correctly

rkJun/flight,KyawNaingTun/flight,david84/flight,icecreamliker/flight,Shinchy/flight,icecreamliker/flight,robertknight/flight,joelbyler/flight,KyawNaingTun/flight,david84/flight,giuseppeg/flight,Shinchy/flight,flightjs/flight,flightjs/flight,robertknight/flight,margaritis/flight,joelbyler/flight