Make Predis\Commands\ServerEvalSHA inherited from Predis\Commands\ServerEval.

lib/Predis/Commands/ServerEvalSHA.php

@@ -2,16 +2,8 @@
 
 namespace Predis\Commands;
 
-class ServerEvalSHA extends Command {
+class ServerEvalSHA extends ServerEval {
     public function getId() {
         return 'EVALSHA';
     }
-
-    protected function onPrefixKeys(Array $arguments, $prefix) {
-        /* NOOP */
-    }
-
-    protected function canBeHashed() {
-        return false;
-    }
 }