[Travis] Don't allow failures
[Travis] Don't allow failures

ReactiveCocoa/ReactiveSwift,walkingsmarts/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,calebd/ReactiveCocoa,ikesyo/ReactiveCocoa,smilypeda/ReactiveCocoa,walkingsmarts/ReactiveCocoa,sandyway/ReactiveCocoa,victorlin/ReactiveCocoa,ohwutup/ReactiveCocoa,smilypeda/ReactiveCocoa,ikesyo/ReactiveCocoa,sandyway/ReactiveCocoa,calebd/ReactiveCocoa,victorlin/ReactiveCocoa,victorlin/ReactiveCocoa,sandyway/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,ohwutup/ReactiveCocoa,calebd/ReactiveCocoa,ohwutup/ReactiveCocoa,smilypeda/ReactiveCocoa,walkingsmarts/ReactiveCocoa