Down bump to PHP 8.1

Author: WyriHaximus

composer.json

@@ -10,18 +10,18 @@
         }
     ],
     "require": {
-        "php": "^8.2",
+        "php": "^8.1",
         "ext-parallel": "*",
         "react-parallel/event-loop": "^2@dev",
         "react/event-loop": "^1.5",
         "react/promise": "^2.11 || ^3.1",
         "reactivex/rxphp": "^2.0.12",
         "wyrihaximus/constants": "^1.6",
-        "wyrihaximus/react-awaitable-observable": "^1.1",
+        "wyrihaximus/react-awaitable-observable": "^1",
         "wyrihaximus/react-event-loop-rx-scheduler-hook-up": "^0.1.1"
     },
     "require-dev": {
-        "wyrihaximus/async-test-utilities": "^7.2",
+        "wyrihaximus/async-test-utilities": "^5 || ^7.2",
         "wyrihaximus/ticking-promise": "^3"
     },
     "autoload": {
@@ -42,7 +42,7 @@
             "infection/extension-installer": true
         },
         "platform": {
-            "php": "8.2.13"
+            "php": "8.1.13"
         },
         "sort-packages": true
     },