Merge pull request #1 from andrew-demb/patch-1

Added SF4 as available in composer requirements

Author: asp24

composer.json

@@ -8,10 +8,10 @@
   },
   "require": {
     "php": ">=7.1",
-    "symfony/event-dispatcher": "~2 || ~3",
-    "symfony/console": "~2 || ~3",
-    "symfony/http-kernel": "~2 || ~3",
-    "symfony/dependency-injection": "~2 || ~3",
+    "symfony/event-dispatcher": "~2 || ~3 || ~4",
+    "symfony/console": "~2 || ~3 || ~4",
+    "symfony/http-kernel": "~2 || ~3 || ~4",
+    "symfony/dependency-injection": "~2 || ~3 || ~4",
     "code-tool/jaeger-client-php": "~2.7"
   },
   "require-dev": {