minor #2773 [Map] Add missing dependency for spatie/phpunit-snapshot-assertions to require-dev (dannyvw)

This PR was merged into the 2.x branch.

Discussion
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[Map] Add missing dependency for spatie/phpunit-snapshot-assertions to require-dev

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Docs?         | no <!-- required for new features -->
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

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There is a reference to the spatie package inside https://github.com/symfony/ux/blob/2.x/src/Map/src/Test/RendererTestCase.php#L16

Commits
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f1797b8 [Map] Add missing dependency for spatie/phpunit-snapshot-assertions to require-dev

Author: Kocal

src/Map/composer.json

@@ -41,7 +41,9 @@
         "symfony/phpunit-bridge": "^7.2",
         "symfony/twig-bundle": "^6.4|^7.0",
         "symfony/ux-twig-component": "^2.18",
-        "symfony/ux-icons": "^2.18"
+        "symfony/ux-icons": "^2.18",
+        "spatie/phpunit-snapshot-assertions": "^4.2.17",
+        "phpunit/phpunit": "^9.6.22"
     },
     "conflict": {
         "symfony/ux-twig-component": "<2.21"