Replace stub with bootstrapFiles for Eloquent class alias (#32)

Author: firecow

bootstrap/eloquent.php

@@ -0,0 +1,5 @@
+<?php
+
+if (!class_exists('Eloquent')) {
+    class_alias(\Illuminate\Database\Eloquent\Model::class, 'Eloquent');
+}

extension.neon

@@ -4,5 +4,5 @@ includes:
 parameters:
     level: 8
     tmpDir: .phpstan
-    stubFiles:
-        - stubs/Eloquent.stub
+    bootstrapFiles:
+        - bootstrap/eloquent.php