Add PHP versions 7.1-8.5 to GHA.

Author: Potherca

.github/workflows/tests.php.unit.yml

@@ -13,8 +13,29 @@ jobs:
           - '5.5'
           - '5.6'
           - '7.0'
+          - '7.1'
+          - '7.2'
+          - '7.3'
+          - '7.4'
+          - '8.0'
+          - '8.1'
+          - '8.2'
+          - '8.3'
+          - '8.4'
+          - '8.5'
         include:
-          - php-version: '7.0'
+          - php-version:
+            - '7.0'
+            - '7.1'
+            - '7.2'
+            - '7.3'
+            - '7.4'
+            - '8.0'
+            - '8.1'
+            - '8.2'
+            - '8.3'
+            - '8.4'
+            - '8.5'
             allow_failure: true
     continue-on-error: ${{ matrix.allow_failure || false }}
     steps: