Update symfony packages to v8

Author: renovate[bot]

composer.json

@@ -20,9 +20,9 @@
         "jdesrosiers/silex-cors-provider": "^1.2",
         "nyholm/psr7": "^1.8",
         "silexandfriends/silex": "^2.3",
-        "symfony/finder": "^4.4",
+        "symfony/finder": "^8.0",
         "symfony/http-foundation": "^4.4",
-        "symfony/http-kernel": "^4.4"
+        "symfony/http-kernel": "^8.0"
     },
     "require-dev": {
         "elife/api": "^2.31",
@@ -33,8 +33,8 @@
         "justinrainbow/json-schema": "^5.1",
         "phpunit/phpunit": "^9.6",
         "squizlabs/php_codesniffer": "^3.5",
-        "symfony/filesystem": "^4.4",
-        "symfony/psr-http-message-bridge": "^2.0"
+        "symfony/filesystem": "^8.0",
+        "symfony/psr-http-message-bridge": "^8.0"
     },
     "config": {
         "platform": {