Add PHP 8.2 to test matrix

Author: ziming

.github/workflows/testing.yml

@@ -19,7 +19,7 @@ jobs:
             # run all combinations of the following, to make sure they're working together
             matrix:
                 # os: [ubuntu-latest, macos-latest, windows-latest]
-                php: [7.3, 7.4, 8.0, 8.1]
+                php: [7.3, 7.4, 8.0, 8.1, 8.2]
                 dbal: [^2.5, ^3.0]
                 laravel: [8.*, 9.*]
                 phpunit: [8.*, 9.*]