add tests on php 8.4

Author: gggeek

Diff for: .github/workflows/ci.yaml

@@ -24,6 +24,8 @@ jobs:
                 include:
                     # @see https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners
                     # @todo run some tests on 'windows-latest' (needs test env setup scripts for windows to be developed)
+                    -   php: '8.4'
+                        operating-system: ubuntu-24.04
                     -   php: '8.3'
                         operating-system: ubuntu-22.04
                     -   php: '8.2'