Merge branch '4.4'

* 4.4:
  Fix some \Throwable support remaining issues

Author: nicolas-grekas

composer.json

@@ -25,7 +25,6 @@
         "symfony/http-client": "^4.4|^5.0",
         "symfony/http-foundation": "^4.4|^5.0",
         "symfony/http-kernel": "^4.4|^5.0",
-        "symfony/var-dumper": "^4.4|^5.0",
         "symfony/intl": "^4.4|^5.0",
         "symfony/yaml": "^4.4|^5.0",
         "symfony/config": "^4.4|^5.0",