Fix PHP 8.1 deprecation warning

laravel / envoy

Elegant SSH tasks for PHP.

https://laravel.com/docs/envoy

MIT License

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Closed bakerkretzmar closed 2 years ago

bakerkretzmar commented 2 years ago

In PHP 8.1 passing null to file_exists() is deprecated, so this PR just defaults that option to an empty string if it's not provided.