🙈 N°3091 Update PHPUnit to 8.5 : add PHPunit cache file to ignore

We don't want to disable the feature, nor we want this file to be versionned
https://phpunit.readthedocs.io/en/8.5/configuration.html#the-cacheresult-attribute

.gitignore

@@ -37,6 +37,9 @@ test/vendor/*
 !/log/index.php
 !/log/web.config
 
+# PHPUnit cache file
+/test/.phpunit.result.cache
+
 
 # Jetbrains
 /.idea/**