Update symfony/filesystem requirement from ^5.2 to ^6.1

[dependabot[bot]]

Updates the requirements on symfony/filesystem to permit the latest version.

Release notes

Sourced from symfony/filesystem's releases.

v6.1.0

Changelog (https://github.com/symfony/filesystem/compare/v6.1.0-RC1...v6.1.0)

• bug #46407 Safeguard (sym)link calls (derrabus)

Changelog

Sourced from symfony/filesystem's changelog.

CHANGELOG

5.4

• Add Path class
• Add $lock argument to Filesystem::appendToFile()

5.0.0

• Filesystem::dumpFile() and appendToFile() don't accept arrays anymore

4.4.0

• support for passing a null value to Filesystem::isAbsolutePath() is deprecated and will be removed in 5.0
• tempnam() now accepts a third argument $suffix.

4.3.0

• support for passing arrays to Filesystem::dumpFile() is deprecated and will be removed in 5.0
• support for passing arrays to Filesystem::appendToFile() is deprecated and will be removed in 5.0

4.0.0

• removed LockHandler
• Support for passing relative paths to Filesystem::makePathRelative() has been removed.

3.4.0

• support for passing relative paths to Filesystem::makePathRelative() is deprecated and will be removed in 4.0

3.3.0

• added appendToFile() to append contents to existing files

3.2.0

• added readlink() as a platform independent method to read links

3.0.0

... (truncated)

Commits

• 3132d2f Merge branch '6.0' into 6.1
• bf7b9d2 Merge branch '5.4' into 6.0
• 36a017f Merge branch '4.4' into 5.4
• 815412e [Filesystem] Safeguard (sym)link calls
• 2938239 Leverage array_is_list(), get_debug_type(), is_countable(), is_iterable(), st...
• c6171eb Merge branch '6.0' into 6.1
• 6c9e4c4 Merge branch '5.4' into 6.0
• 3a44421 Missing return type in getFilenameWithoutExtension function
• 7fca565 Leverage non-capturing catches
• d160eaf Merge branch '6.0' into 6.1
• Additional commits viewable in compare view

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