chore: Allowed PHPUnit 9

Author: alexsoft

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 All notable changes to `laravel-notification-channels/pushbullet` will be documented in this file
 
+## 1.3.1 - 2021-12-17
+### Changed
+- Minor CI improvements
+- Allowed PHPUnit 9
+
 ## 1.3.0 - 2021-07-28
 ### Changed
 - Bumped PHP requirement to 7.3

composer.json

@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "mockery/mockery": "^1.2.0",
-        "phpunit/phpunit": "^8.5.21"
+        "phpunit/phpunit": "^8.5.21 || ^9.0"
     },
     "autoload": {
         "psr-4": {