fix PDO::quote(): Passing null to parameter #1 ($string) of type string is deprecated in PHP8.1

Author: guanguans

src/ServiceProvider.php

@@ -45,7 +45,10 @@ public function boot()
             $duration = $this->formatDuration($query->time / 1000);
 
             if (count($bindings) > 0) {
-                $realSql = vsprintf($sqlWithPlaceholders, array_map([$pdo, 'quote'], $bindings));
+                $realSql = vsprintf($sqlWithPlaceholders, array_map(
+                    static fn($binding) => $binding === null ? 'NULL' : $pdo->quote($binding),
+                    $bindings
+                ));
             }
             Log::channel(config('logging.query.channel', config('logging.default')))
                 ->debug(sprintf('[%s] [%s] %s | %s: %s', $query->connection->getDatabaseName(), $duration, $realSql,