[composer] Set dependencies for 4.0.0-rc4 release.

composer.json

@@ -15,24 +15,24 @@
     "require": {
         "php": "^7.4 || ^8.0",
         "ext-json": "*",
-        "ibexa/core": "^4.0@dev",
-        "ibexa/admin-ui": "^4.0@dev",
+        "ibexa/core": "^4.0@rc",
+        "ibexa/admin-ui": "^4.0@rc",
         "ocramius/proxy-manager": "^2.2",
         "symfony/proxy-manager-bridge": "^5.0",
         "zetacomponents/system-information": "^1.1.1"
     },
     "require-dev": {
-        "ibexa/ci-scripts": "^0.2@dev",
+        "ibexa/ci-scripts": "^0.2@rc",
         "ibexa/code-style": "^1.0",
         "friendsofphp/php-cs-fixer": "^3.0",
-        "ibexa/doctrine-schema": "^4.0@dev",
-        "ibexa/content-forms": "^4.0@dev",
-        "ibexa/design-engine": "^4.0@dev",
-        "ibexa/user": "^4.0@dev",
-        "ibexa/fieldtype-richtext": "^4.0@dev",
-        "ibexa/rest": "^4.0@dev",
-        "ibexa/search": "^4.0@dev",
-        "ibexa/http-cache": "^4.0@dev",
+        "ibexa/doctrine-schema": "^4.0@rc",
+        "ibexa/content-forms": "^4.0@rc",
+        "ibexa/design-engine": "^4.0@rc",
+        "ibexa/user": "^4.0@rc",
+        "ibexa/fieldtype-richtext": "^4.0@rc",
+        "ibexa/rest": "^4.0@rc",
+        "ibexa/search": "^4.0@rc",
+        "ibexa/http-cache": "^4.0@rc",
         "phpunit/phpunit": "^8.2",
         "matthiasnoback/symfony-dependency-injection-test": "^4.0"
     },
@@ -61,4 +61,4 @@
         "check-cs": "@fix-cs --dry-run",
         "test": "phpunit -c phpunit.xml"
     }
-}
+}