Update ContainerBindConcreteWithClosureOnlyRector Rule

Prevent changes when the abstract class is a variable.

Author: jf-m

src/Rector/MethodCall/ContainerBindConcreteWithClosureOnlyRector.php

@@ -3,6 +3,7 @@
 namespace RectorLaravel\Rector\MethodCall;
 
 use PhpParser\Node;
+use PhpParser\Node\Expr\Variable;
 use PhpParser\Node\Const_;
 use PhpParser\Node\Expr\Closure;
 use PhpParser\Node\Expr\MethodCall;
@@ -74,6 +75,10 @@ public function refactor(Node $node): ?MethodCall
         $classString = $node->getArgs()[0]->value;
         $concreteNode = $node->getArgs()[1]->value;
 
+        if ($classString instanceof Node\Expr\Variable) {
+            return null;
+        }
+
         if (! $concreteNode instanceof Closure) {
             return null;
         }