php.yml: Test on PHP 8.x (#53)

* php.yml: Test on PHP 8.x

* Update php.yml

---------

Co-authored-by: Jeroen De Dauw <[email protected]>

Author: reedy

.github/workflows/php.yml

@@ -14,9 +14,14 @@ jobs:
       matrix:
         php:
           - '7.4'
+          - '8.0'
+          - '8.1'
+          - '8.2'
+          - '8.3'
+          - '8.4'
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 2