Revert "Made Data.bytes an internal extension"

This reverts commit 668d6adb0b1b38a4b1789a9cbeabdf746ec1470a.

Sources/CryptoSwift/Foundation/Data+Extension.swift

@@ -87,8 +87,8 @@ extension Data {
 }
 
 extension Data {
-    
-    internal var bytes: Array<UInt8> {
+
+    public var bytes: Array<UInt8> {
         return Array(self)
     }