Array and string offset access syntax with curly braces is no longer supported

When trying to upgrade the Magento version to 2.4.5-p14. Upgraded successfully. But when i compile, i got an error like

> strpos(): Argument #1 ($haystack) must be of type string, bool given#0 setup/src/Magento/Setup/Module/Di/Code/Reader/ClassesScanner.php(71)

I tried the following code to get a list of files that have a parsing error

> find app/code vendor -type f -name "*.php" -exec php -l {} \; | grep -B1 "Errors parsing"

I'm using PHP version 8.1. & "astock/stock-api-libphp" - "version": "1.1.6"
PHP 8 removed curly brace syntax for arrays/strings. But the following file still uses {} for an array

> PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in vendor/astock/stock-api-libphp/libs/phpcs-psr2-stock/PSR2Stock/Sniffs/Methods/ValidFunctionNameSniff.php on line 133

vendor/astock/stock-api-libphp/libs/phpcs-psr2-stock/PSR2Stock/Sniffs/Methods/ValidFunctionNameSniff.php の 133 行付近から始め、PHP 8.1 で報告されている波括弧によるオフセット構文を調べます。提供されている find および php -l コマンドを app/code と vendor に対して実行します。対象ファイルで致命的な解析エラーが発生しなくなれば完了です。

索引モデルが issue の本文から書いたものです。