change au objects source

Author: daneastmond

composer.json

@@ -31,7 +31,7 @@
     ],
     "require": {
         "omnipay/common": "^3",
-        "academe/authorizenet-objects": "php8-subscription-support-dev",
+        "academe/authorizenet-objects": "subscription-support-dev",
         "symfony/property-access": "^3.2 || ^4.0"
     },
     "require-dev": {