Added conflict with guzzlehttp/ringphp versions prior to 1.1.1

PHP 7.3 support has been added in version 1.1.1

Author: michalbundyra

composer.json

@@ -54,6 +54,9 @@
     "config": {
         "sort-packages": true
     },
+    "conflict": {
+        "guzzlehttp/ringphp": "<1.1.1"
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "1.4.x-dev",