Fix PHP 8.1 types

Author: samdark

src/Query.php

@@ -158,7 +158,7 @@ public function addOptions($options)
  public function andFilterCompare($name, $value, $defaultOperator = '=')
  {
  $matches = [];
- if (preg_match('/^(<>|>=|>|<=|<|=)/', $value, $matches)) {
+ if (preg_match('/^(<>|>=|>|<=|<|=)/', (string)$value, $matches)) {
  $op = $matches[1];
  $value = substr($value, strlen($op));
  } else {