PHP5 Compliance

Author: allflame

composer.json

@@ -7,12 +7,12 @@
     }
   },
   "require": {
-    "php": "~5.6 || ~7",
-    "symfony/event-dispatcher": "~2 || ~3",
-    "symfony/console": "~2 || ~3",
-    "symfony/http-kernel": "~2 || ~3",
-    "symfony/dependency-injection": "~2 || ~3",
-    "code-tool/jaeger-client-php": "~1.7 || ~2.7"
+    "php": "~5.6 || ~7.1",
+    "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": "~1.7 || ~2.7 || ~4"
   },
   "require-dev": {
     "php-ds/php-ds": "@stable",