Fix BindingResolutionException when using Laravel 7.7.0 or greater

Author: singhofmarco

src/Services/DataTable.php

@@ -186,14 +186,14 @@ public function request()
      */
     public function ajax()
     {
-        $source = null;
+        $query = null;
         if (method_exists($this, 'query')) {
-            $source = app()->call([$this, 'query']);
-            $source = $this->applyScopes($source);
+            $query = app()->call([$this, 'query']);
+            $query = $this->applyScopes($query);
         }
 
         /** @var \Yajra\DataTables\DataTableAbstract $dataTable */
-        $dataTable = app()->call([$this, 'dataTable'], compact('source'));
+        $dataTable = app()->call([$this, 'dataTable'], compact('query'));
 
         if ($callback = $this->beforeCallback) {
             $callback($dataTable);