remove unit tests on 8.4 (for now)

Author: lubiana

.github/workflows/test.yml

@@ -7,7 +7,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php: [7.4, 8.0, 8.1, 8.2, 8.3, 8.4]
+                php: [7.4, 8.0, 8.1, 8.2, 8.3]
         runs-on: ubuntu-latest
         steps:
             - name: Checkout repository