Added missing `public` visibility for `and` operator
Added missing `public` visibility for `and` operator

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