Allow php8 in all composer.json files

Author: andrewmy

composer.json

@@ -10,7 +10,7 @@
   "homepage": "https://enqueue.forma-pro.com/",
   "license": "MIT",
   "require": {
-    "php": "^7.3",
+    "php": "^7.3|^8.0",
     "queue-interop/queue-interop": "^0.8",
     "mongodb/mongodb": "^1.2",
     "ext-mongodb": "^1.5"