chore: add Laravel 9.x support

Author: joostdebruijn

.github/workflows/tests.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.3, 7.4, 8.0]
+        php: [7.3, 7.4, 8.0, 8.1]
 
     name: PHP ${{ matrix.php }}
 

composer.json

@@ -13,14 +13,14 @@
     ],
     "require": {
         "php": "^7.2|^8.0",
-        "illuminate/notifications": "^5.3|^6.0|^7.0|^8.0",
-        "illuminate/support": "^5.1|^6.0|^7.0|^8.0",
+        "illuminate/notifications": "^5.3|^6.0|^7.0|^8.0|^9.0",
+        "illuminate/support": "^5.1|^6.0|^7.0|^8.0|^9.0",
         "minishlink/web-push": "^6.0"
     },
     "require-dev": {
         "mockery/mockery": "~1.0",
-        "orchestra/testbench": "^4.0",
-        "phpunit/phpunit": "^8.5"
+        "orchestra/testbench": "^4.0|^5.0|^6.0|^7.0",
+        "phpunit/phpunit": "^8.5|^9.0"
     },
     "autoload": {
         "psr-4": {