PredicateFlow doesn't compile when installed on a fresh project through CocoaPods. This seems to be because it is configured with a minimum deployment target of iOS 8.0, while depending on RealmSwift, which is configured with a minimum target of 9.0.

To reproduce:

1. Create a new iOS project
2. pod init
3. Add pod 'PredicateFlow' and pod 'PredicateFlow/Realm' to the podfile
4. pod install
5. Build your workspace

You should see an error like

Compiling for iOS 8.0, but module 'RealmSwift' has a minimum deployment target of iOS 9.0: /.../Library/Developer/Xcode/DerivedData/.../Build/Products/Debug-iphonesimulator/RealmSwift/RealmSwift.framework/Modules/RealmSwift.swiftmodule/x86_64-apple-ios-simulator.swiftmodule

I think it would be fixed by changing this library's CocoaPods configuration so that the minimum deployment target is 9.0.