Bump RxSwift dependency to RxSwift 3.1.0
Bump RxSwift dependency to RxSwift 3.1.0

tgyhlsb/RxSwiftExt,RxSwiftCommunity/RxSwiftExt,RxSwiftCommunity/RxSwiftExt,RxSwiftCommunity/RxSwiftExt,RxSwiftCommunity/RxSwift-Ext,tgyhlsb/RxSwiftExt,RxSwiftCommunity/RxSwift-Ext