symfony finder update to ^4.3

[serbancatalin]

This commit 9665d58 makes use of getFilenameWithoutExtension at:

rector/src/Console/Option/LevelOptionResolver.php

Line 130 in 2ab3cfd

$distance = levenshtein($configFile->getFilenameWithoutExtension(), $levelName);

that was introduced in symfony/finder 4.3.0 symfony/finder@aae6c6d

Sould symfony/finder be updated to ^4.3 ?
Also php to 7.1.3 symfony/finder@29a3a80 ?

[TomasVotruba]

Oh, thanks for reporting, didn't realize that.

Code should work with symfony/finder 3.4 as well, so people can easily install it on older Symfony projects. So instead of bumping composer version, the getFilenameWithoutExtension should be changed