Test on PHP 8.2 (#45)

* Test on PHP 8.2

* Update actions/checkout to v3

Author: ShawnCZek

.github/workflows/run-tests.yml

@@ -9,10 +9,11 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [ 7.4, 8.0, 8.1 ]
+        php: [ 7.4, 8.0, 8.1, 8.2 ]
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Checkout code
+        uses: actions/checkout@v3
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2