test on PHP 8.1

Author: othillo

.github/workflows/ci.yml

@@ -14,16 +14,13 @@ jobs:
   tests:
     name: "Run tests"
     runs-on: "ubuntu-20.04"
-    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
         php-version:
           - "7.3"
           - "7.4"
-        experimental: [false]
-        include:
-          - php-version: "8.0"
-            experimental: true
+          - "8.0"
+          - "8.1"
     services:
       redis:
         image: "redis:5"