Update dependency phpunit/phpunit to v10 (#344)

* Update dependency phpunit/phpunit to v10

* Migrate phpunit config

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Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Ben Challis <[email protected]>

Author: renovate[bot]

composer.json

@@ -31,7 +31,7 @@
     "phpstan/phpstan-deprecation-rules": "^1.1.3",
     "phpstan/phpstan-phpunit": "^1.3.11",
     "phpstan/phpstan-strict-rules": "^1.5.1",
-    "phpunit/phpunit": "^9.6.7",
+    "phpunit/phpunit": "^10.1.0",
     "rector/rector": "^0.15.24"
   },
   "config": {