Test PHP 8.2 experimental on CI

Author: ruudk

.github/workflows/build-and-test.yml

@@ -9,6 +9,9 @@ jobs:
       matrix:
         php: ['7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
         experimental: [false]
+        include:
+          - php: '8.2'
+            experimental: true
     steps:
       - name: Checkout
         uses: actions/checkout@v2