Update ci.yml

- Update `actions/checkout` to the latest version
- Add newer PHP versions to the matrix
- Add EOL dates as comments to PHP version

Author: Potherca

.github/workflows/ci.yml

@@ -13,11 +13,22 @@ jobs:
 
         strategy:
             matrix:
-                php-version: [ '7.3', '7.4', '8.0', '8.1', '8.2' ]
+                php-version:
+                    - 7.3  # from 2018-12 to 2020-12 (2021-12)
+                    - 7.4  # from 2019-11 to 2021-11 (2022-11)
+                    - 8.0  # from 2020-11 to 2022-11 (2023-11)
+                    - 8.1  # from 2021-11 to 2023-11 (2025-12)
+                    - 8.2  # from 2022-12 to 2024-12 (2026-12)
+                    - 8.3  # from 2023-11 to 2025-12 (2027-12)
+                    - 8.4  # from 2024-11 to 2026-12 (2028-12)
+                    - 8.5  # from 2025-11 to 2027-12 (2029-12)
+
+        # Prevent unsupported versions of PHP to fail the CI run
+        continue-on-error: ${{ contains(fromJson("[ '7.3', '7.4', '8.0', '8.1', '8.2' ]"), matrix.php-version) == false }}
 
         steps:
             - name: Checkout code
-              uses: actions/checkout@v2
+              uses: actions/checkout@v4
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2