Update vimeo/psalm requirement from ^5.20.0 to ^5.21.0

[dependabot[bot]]

Updates the requirements on vimeo/psalm to permit the latest version.

Release notes

Sourced from vimeo/psalm's releases.

5.21.0

What's Changed

Features

• Allow importing typedefs from enums by @​weirdan in vimeo/psalm#10617

Fixes

• Fix #10552 by @​danog in vimeo/psalm#10572
• Unit test improvements for php-parser 5 by @​edsrzf in vimeo/psalm#10574
• Fix template replacement edge case by @​klimick in vimeo/psalm#10586
• Switch condition order by @​edsrzf in vimeo/psalm#10594
• Partial revert "Fix auto completion by partial property or method" by @​issidorov in vimeo/psalm#10588
• [LSP] Add issue type in description by @​weirdan in vimeo/psalm#10607
• Do not validate callable arguments in lenient contexts by @​weirdan in vimeo/psalm#10601
• readgzfile() is impure by @​weirdan in vimeo/psalm#10600
• Allow properties on intersections with enum interfaces by @​weirdan in vimeo/psalm#10599
• key_exists() is an alias for array_key_exists() by @​weirdan in vimeo/psalm#10598
• Fix language server running with opcache.save_comments=0 by @​weirdan in vimeo/psalm#10614
• Report MissingConstructor for natively typed mixed properties by @​weirdan in vimeo/psalm#10615

Internal changes

• Bump actions/cache from 3 to 4 by @​dependabot in vimeo/psalm#10584
• Baseline update by @​jorgsowa in vimeo/psalm#10593
• Re-work CheckTrivialExprVisitor by @​edsrzf in vimeo/psalm#10612
• Minor php-parser tweaks by @​edsrzf in vimeo/psalm#10605

New Contributors

• @​jorgsowa made their first contribution in vimeo/psalm#10593

Full Changelog: https://github.com/vimeo/psalm/compare/5.20.0...5.21.0

Commits

• 04ba935 Merge pull request #10605 from edsrzf/php-parser-tweaks
• 35e6eff Merge pull request #10617 from weirdan/10416-import-typedefs-from-enums
• 6d32d2f Allow importing typedefs from enums
• baa8660 Merge pull request #10615 from weirdan/10589-fix-missing-MissingConstructor-w...
• ca9a12d Report MissingConstructor for natively typed mixed properties
• e02276a Merge pull request #10614 from weirdan/fix-json-mapping-with-opcache.save_com...
• 98756ba Fix language server running with opcache.save_comments=0
• f045730 Merge pull request #10598 from weirdan/key_exists-is-an-alias-for-array_key_e...
• fd1294e Merge pull request #10599 from weirdan/allow-properties-on-intersections-with...
• 8354ff3 Merge pull request #10600 from weirdan/readgzfile-is-impure
• Additional commits viewable in compare view

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