Merge branch '4.3' into 4.4

* 4.3:
  bug #34554 [HttpClient] Fix early cleanup of pushed HTTP/2 responses (lyrixx)

Author: nicolas-grekas

composer.json

@@ -21,6 +21,7 @@
         "symfony/cache": "^4.4|^5.0",
         "symfony/config": "^4.3.4|^5.0",
         "symfony/dependency-injection": "^4.4.1|^5.0.1",
+        "symfony/error-handler": "^4.4.1|^5.0.1",
         "symfony/http-foundation": "^4.4|^5.0",
         "symfony/http-kernel": "^4.4",
         "symfony/polyfill-mbstring": "~1.0",