No Enum class to extend (at the moment)

lib/crypto.php

@@ -3,7 +3,8 @@ declare(strict_types=1);
 
 namespace SCCP\Crypto;
 
-class HashAlgo extends Enum {
+class HashAlgo // extends Enum 
+{
     private const SHA1 = 0;
     private const SHA256 = 1;
 }
@@ -27,4 +28,4 @@ class Crypto {
 }
 
 class Signer {
-}
+}