Support PHP 8 (#61)

Author: Naktibalda

.github/workflows/main.yml

@@ -22,13 +22,15 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.0, 7.1, 7.2, 7.3, 7.4]
+        php: [7.0, 7.1, 7.2, 7.3, 7.4, 8.0]
         symfony: [3.4, 4, 5]
         exclude:
           - php: 7.3
             symfony: 3.4
           - php: 7.4
             symfony: 3.4
+          - php: 8.0
+            symfony: 3.4
           - php: 7.0
             symfony: 4
           - php: 7.0
@@ -70,9 +72,14 @@ jobs:
         path: framework-tests
         ref: symfony5
 
-    - name: Install Symfony Sample
-      run: |
-        composer update --no-dev --prefer-dist --no-interaction
+    - name: Install Symfony Sample on PHP7
+      if: matrix.php < 8
+      run: composer update --no-dev --prefer-dist --no-interaction
+      working-directory: framework-tests
+
+    - name: Install Symfony Sample on PHP8
+      if: matrix.php == 8.0
+      run: composer update --no-dev --prefer-dist --no-interaction --ignore-platform-req=php
       working-directory: framework-tests
 
     - name: Validate composer.json and composer.lock

composer.json

@@ -12,7 +12,7 @@
     ],
     "minimum-stability": "RC",
     "require": {
-        "php": ">=7.0.8 <8.0",
+        "php": ">=7.0.8 <9.0",
         "codeception/lib-innerbrowser": "^1.3",
         "codeception/codeception": "^4.0",
         "ext-json": "*"