Update ci.yml

add php 8.3 experimental

Author: Scarbous

.github/workflows/ci.yml

@@ -5,13 +5,17 @@ on: [ push, pull_request ]
 jobs:
   test:
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.env.experimental == true }}
     strategy:
+      fail-fast: false
       matrix:
         env:
           - { php: 7.4, phpunit: 9 }
           - { php: 8.0, phpunit: 10 }
           - { php: 8.1, phpunit: 10 }
           - { php: 8.2, phpunit: 10 }
+          - { php: 8.3, phpunit: 10, experimental: true }
+
     steps:
       - uses: actions/checkout@v3
       - name: Composer cache