Add GitHub permissions and add PHP 8.4 to tests

Author: williamdes

.github/workflows/tests.yml

@@ -1,5 +1,8 @@
 name: Run tests
 
+permissions:
+  contents: read
+
 on:
   push:
   pull_request:
@@ -12,7 +15,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                php-version: ["5.4", "5.5", "5.6", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1", "8.2", "8.3"]
+                php-version: ["5.4", "5.5", "5.6", "7.1", "7.2", "7.3", "7.4", "8.0", "8.1", "8.2", "8.3", "8.4"]
                 experimental: [false]
                 composer-options: ['']
                 include: