Update PHPUnit to v11 and run in GH Actions

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ on:
 
 jobs:
   build-and-test:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
 
     steps:
     - uses: actions/checkout@v4
@@ -46,6 +46,11 @@ jobs:
         CI_COMMIT_SHORT_SHA=$(echo $CI_COMMIT_SHA | head -c8)
         ./bin/platform self:build --no-composer-rebuild --yes --replace-version "$CI_COMMIT_REF_NAME"-"$CI_COMMIT_SHORT_SHA" --output platform.phar
 
+    - name: Run PHPUnit tests
+      run: |
+        composer install --no-interaction --no-scripts
+        ./scripts/test/unit.sh
+
     - name: Clone main CLI repository
       run: git clone https://github.com/platformsh/cli.git ./cli
 

.gitignore

@@ -4,3 +4,4 @@
 .idea/
 /release-changelog*.md
 /local-php-security-checker
+/.phpunit.result.cache

composer.json

@@ -42,7 +42,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.3 !=4.8.0",
+        "phpunit/phpunit": "^11",
         "drush/drush": "^8.0"
     },
     "authors": [