Updated Drupal to 8.6. This goes with the following updates because it's possible...
[yaffs-website] / vendor / symfony / http-foundation / Session / Storage / Proxy /
drwxr-xr-x   ..
-rw-r--r-- 2343 AbstractProxy.php
-rw-r--r-- 1177 NativeProxy.php
-rw-r--r-- 2319 SessionHandlerProxy.php