phpunit ci changes

Author: peterfox

.github/workflows/run-tests.yml

@@ -18,7 +18,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         php: [8.4]
-        phpunit: [10.*, 11.*, 12.*]
+        phpunit: [^10.5.60, ^11.5.48, ^12.0]
         stability: [prefer-lowest, prefer-stable]
 
     name: P${{ matrix.php }} - PHPUnit:${{ matrix.phpunit }} - ${{ matrix.stability }} - ${{ matrix.os }}