Add pivot class property (#1518)

* Add pivot class property

* Add test for pivot class properties

* Fix failed test for pivot class properties

* Update CHANGELOG.md

* Fix failed test

tests/Console/ModelsCommand/Pivot/__snapshots__/Test__test__1.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Pivot\Models;
+
+use Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Pivot\Models\Pivots\CustomPivot;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * 
+ *
+ * @property-read CustomPivot $customAccessor
+ * @property-read \Illuminate\Database\Eloquent\Collection<int, ModelWithPivot> $relationWithCustomPivot
+ * @property-read int|null $relation_with_custom_pivot_count
+ * @method static \Illuminate\Database\Eloquent\Builder|ModelWithPivot newModelQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|ModelWithPivot newQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|ModelWithPivot query()
+ * @mixin \Eloquent
+ */
+class ModelWithPivot extends Model
+{
+    public function relationWithCustomPivot()
+    {
+        return $this->belongsToMany(ModelwithPivot::class)
+            ->using(CustomPivot::class)
+            ->as('customAccessor');
+    }
+}
+<?php
+
+namespace Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\Pivot\Models\Pivots;
+
+use Illuminate\Database\Eloquent\Relations\Pivot;
+
+/**
+ * 
+ *
+ * @method static \Illuminate\Database\Eloquent\Builder|CustomPivot newModelQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|CustomPivot newQuery()
+ * @method static \Illuminate\Database\Eloquent\Builder|CustomPivot query()
+ * @mixin \Eloquent
+ */
+class CustomPivot extends Pivot
+{
+
+}