Set return type of `GetState` to be an `Optional<StateType>`
Set return type of `GetState` to be an `Optional<StateType>`

ReSwift/ReSwift,ycfreeman/ReSwift,Swift-Flow/Swift-Flow,ycfreeman/ReSwift,ycfreeman/ReSwift,ReSwift/ReactiveReSwift,ReSwift/ReSwift,ReSwift/ReactiveReSwift,ReSwift/ReSwift,mpsnp/ReSwift,Swift-Flow/Swift-Flow,ycfreeman/ReSwift,mpsnp/ReSwift,Swift-Flow/Swift-Flow,ycfreeman/ReSwift,Swift-Flow/Swift-Flow,mpsnp/ReSwift,ReSwift/ReactiveReSwift,Swift-Flow/Swift-Flow