added missing $ to filter

Author: daveismynamecom

src/Api/ToDo.php

@@ -12,7 +12,7 @@ public function getTasks($top = 25, $skip = 0, $params = [])
             $skip = request('skip', $skip);
 
             $params = http_build_query([
-                "\filter" => "status eq 'notStarted'",
+                "\$filter" => "status eq 'notStarted'",
                 "\$top" => $top,
                 "\$skip" => $skip,
                 "\$count" => "true",