Bump react renderer

Author: nacmartin

composer.json

@@ -18,7 +18,7 @@
         "symfony/config": "^2.7.0|^3.0.6|^4.0",
         "symfony/http-kernel": "^2.7.0|^3.0.6|^4.0",
         "symfony/dependency-injection": "^2.7.0|^3.0.6|^4.0",
-        "limenius/react-renderer": "^3.0.0"
+        "limenius/react-renderer": "^4.0.0"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^2.5",