php: Don't test on PHP 5.6 through 7.1

.github/workflows/php.yml

@@ -51,14 +51,16 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     env:
-      phpunit-version: 5.7.27
-      mockery-version: 0.9.9 # *Any* other version is not compatible with PHP 5.6 and anything above phpunit 6
+      phpunit-version: 9.5.4
 
     strategy:
       fail-fast: false
       matrix:
-        php: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        php: ['7.2', '7.3', '7.4', '8.0']
         os: ['ubuntu-latest']
+        include:
+          - php: '7.2'
+            phpunit-version: 8.5.15
 
     services:
       mysql:
@@ -98,13 +100,13 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
-          tools: phpunit:${{ env.phpunit-version }}
+          tools: phpunit:${{ matrix.phpunit-version || env.phpunit-version }}
           extensions: mysql, pgsql, ldap
 
       - name: Setup dependencies
         run: |
           sudo locale-gen en_US.UTF-8 de_DE.UTF-8 fr_FR.UTF-8
-          composer require -n --no-progress mockery/mockery:${{ env.mockery-version }}
+          composer require -n --no-progress mockery/mockery
 
       - name: PHPUnit
         env: