Remove PHP 7.X from testing & add 8.2 & 8.3

Author: LKaemmerling

.github/workflows/php.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
+        php-versions: [ '8.0', '8.1', '8.2', '8.3' ]
     steps:
     - uses: actions/checkout@v2
     - name: Setup PHP