Updated Drupal to 8.6. This goes with the following updates because it's possible...
[yaffs-website] / web / core / tests / Drupal / Tests / Core / Session /
drwxr-xr-x   ..
-rw-r--r-- 1536 AccountProxyTest.php
-rw-r--r-- 716 AnonymousUserSessionTest.php
-rw-r--r-- 7961 PermissionsHashGeneratorTest.php
-rw-r--r-- 8578 SessionConfigurationTest.php
-rw-r--r-- 5380 UserSessionTest.php
-rw-r--r-- 5637 WriteSafeSessionHandlerTest.php