Run tests on latest Skript version

Author: Pikachu920

.github/workflows/gradle.yml

@@ -39,5 +39,4 @@ jobs:
         uses: SkriptLang/[email protected]
         with:
           test_script_directory: src/test/scripts
-          skript_repo_ref: 2.8.2
           extra_plugins_directory: extra-plugins/