Merge pull request #39 from imponeer/dependabot/github_actions/shivammathur/setup-php-2.28.0

Bump shivammathur/setup-php from 2.26.0 to 2.28.0

Author: github-actions[bot]

.github/workflows/on-pull-request.yml

@@ -26,7 +26,7 @@ jobs:
     name: PHP ${{ matrix.php }}; ${{ matrix.os }}
     steps:
       - name: Setup PHP
-        uses: shivammathur/setup-php@2.26.0
+        uses: shivammathur/setup-php@2.28.0
         with:
           php-version: ${{ matrix.php }}
           extensions: curl, json, mbstring, pcre