Update symfony/var-dumper requirement from ^6.4 to ^7.1

[dependabot[bot]]

Updates the requirements on symfony/var-dumper to permit the latest version.

Release notes

Sourced from symfony/var-dumper's releases.

v7.1.2

Changelog (https://github.com/symfony/var-dumper/compare/v7.1.1...v7.1.2)

• bug symfony/symfony#57397 [VarDumper] Fix FFI caster test (@​alexandre-daubois)

Changelog

Sourced from symfony/var-dumper's changelog.

CHANGELOG

7.1

• Add support for new DOM extension classes in DOMCaster

7.0

• Add argument $label to VarDumper::dump()
• Require explicit argument when calling VarDumper::setHandler()
• Remove display of backtrace in Twig_Template, only Twig\Template is supported

6.4

• Dump uninitialized properties

6.3

• Add caster for WeakMap
• Add support of named arguments to dd() and dump() to display the argument name
• Add support for Relay\Relay
• Add display of invisible characters

6.2

• Add support for FFI\CData and FFI\CType
• Deprecate calling VarDumper::setHandler() without arguments

5.4

• Add ability to style integer and double values independently
• Add casters for Symfony's UUIDs and ULIDs
• Add support for Fiber

5.2.0

• added support for PHPUnit --colors option
• added VAR_DUMPER_FORMAT=server env var value support
• prevent replacing the handler when the VAR_DUMPER_FORMAT env var is set

5.1.0

... (truncated)

Commits

• 5857c57 Merge branch '7.0' into 7.1
• a9d8914 Merge branch '6.4' into 7.0
• c33d420 take the new DOM HTMLElement class into account
• c31566e [VarDumper] Fix FFICaster test to be platform-adaptable
• f828481 [VarDumper] Fix FFI caster test
• deb2c2b Merge branch '7.0' into 7.1
• 5d2a35f Merge branch '6.4' into 7.0
• ad23ca4 Merge branch '5.4' into 6.4
• af8868a Revert "minor #54653 Auto-close PRs on subtree-splits (nicolas-grekas)"
• 595e4a4 Merge branch '7.0' into 7.1
• Additional commits viewable in compare view

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