Make CardReaderConfigProvider conformance to ReaderTokenProvider explicit.

Author: ctarda

Hardware/Hardware/CardReader/CardReaderConfigProvider.swift

@@ -10,7 +10,7 @@ public protocol ReaderLocationProvider {
     func fetchDefaultLocationID(completion: @escaping(String?, Error?) -> Void)
 }
 
-public protocol CardReaderConfigProvider: ReaderLocationProvider {
+public protocol CardReaderConfigProvider: ReaderLocationProvider, ReaderTokenProvider {
     func fetchToken(completion: @escaping(String?, Error?) -> Void)
     func fetchDefaultLocationID(completion: @escaping(String?, Error?) -> Void)
 }