Update test workflow to drop support for php 8.0 and older

Author: julesgraus

.github/workflows/run-tests.yml

@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [7.2, 7.3, 7.4, 8.0, 8.1, '8.2']
+        php: [8.1, 8.2]
 
     name: P${{ matrix.php }}