Added PHP 8.2 to GitHub-Actions

Author: JanSlabon

.github/workflows/tests.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        php: ['8.0', '8.1']
+        php: ['8.0', '8.1', '8.2']
     steps:
       - name: Checkout
         uses: actions/checkout@v2