Allow queue interop 0.8 in packages

Author: makasim

composer.json

@@ -8,7 +8,7 @@
     "require": {
         "php": "^7.1.3",
         "ext-gearman": "^2.0",
-        "queue-interop/queue-interop": "^0.7"
+        "queue-interop/queue-interop": "^0.7|^0.8"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.4.0",