Merge pull request #41 from php-school/php81

Run on PHP 8.1

Author: AydinHassan

.github/workflows/build.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [8.0]
+        php: [8.0, 8.1]
 
     name: PHP ${{ matrix.php }}
     steps: