Allow ErrorHandler ^5.0 to be used in HttpKernel

Author: mpdude

composer.json

@@ -17,7 +17,7 @@
  ],
  "require": {
  "php": ">=7.1.3",
- "symfony/error-handler": "^4.4",
+ "symfony/error-handler": "^4.4|^5.0",
  "symfony/event-dispatcher": "^4.4",
  "symfony/http-client-contracts": "^1.1|^2",
  "symfony/http-foundation": "^4.4.30|^5.3.7",