Add PHP 8 support

Author: WyriHaximus

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
       - supported-versions-matrix
     runs-on: ubuntu-latest
     container:
-      image: wyrihaximusnet/php:${{ matrix.php }}-zts-alpine3.12-dev-root
+      image: wyrihaximusnet/php:${{ matrix.php }}-nts-buster-dev-root
     steps:
       - uses: actions/checkout@v1
       - name: Cache composer packages
@@ -70,7 +70,7 @@ jobs:
       - supported-versions-matrix
     runs-on: ubuntu-latest
     container:
-      image: wyrihaximusnet/php:${{ matrix.php }}-zts-alpine3.12-dev-root
+      image: wyrihaximusnet/php:${{ matrix.php }}-nts-buster-dev-root
     steps:
       - uses: actions/checkout@v1
       - name: Cache composer packages

composer.json

@@ -9,8 +9,8 @@
         }
     ],
     "require": {
-        "php": "^7.4",
-        "ext-session": "^7.4",
+        "php": "^8 || ^7.4",
+        "ext-session": "^8 || ^7.4",
         "hansott/psr7-cookies": "^3.0.2",
         "psr/http-message": "^1.0.1",
         "react/cache": "^1.1.1",