Update composer.json

Added ramsey/uuid 4.0 support.

Author: a-menshchikov

composer.json

@@ -21,7 +21,7 @@
     "bunny/bunny": "^0.2.4|^0.3|^0.4",
     "php-amqplib/php-amqplib": "^2.7",
     "doctrine/dbal": "^2.6",
-    "ramsey/uuid": "^2|^3.5",
+    "ramsey/uuid": "^2|^3.5|^4.0",
     "psr/log": "^1",
     "psr/container": "^1",
     "makasim/temp-file": "^0.2",