Add missing defaul implementation

Sources/CryptoSwift/Updatable.swift

@@ -41,6 +41,10 @@ extension Updatable {
         }
     }
 
+    public mutating func update(withBytes bytes: ArraySlice<UInt8>, isLast: Bool = false) throws -> Array<UInt8> {
+        return try update(withBytes: bytes, isLast: isLast)
+    }
+
     public mutating func update(withBytes bytes: Array<UInt8>, isLast: Bool = false) throws -> Array<UInt8> {
         return try update(withBytes: bytes.slice, isLast: isLast)
     }