explisitly add queue interop dev package as dep

Author: makasim

composer.json

@@ -8,6 +8,7 @@
     "require": {
         "php": ">=7.1",
         "enqueue/enqueue": "0.9.x-dev",
+        "queue-interop/queue-interop": "0.7.x-dev",
         "symfony/console": "^3.4|^4",
         "symfony/process": "^3.4|^4"
     },