pglogical (http://2ndquadrant.com/en-us/resources/pglogical/ http://2ndquadrant.com/en-us/resources/pglogical/) claims to allow cross version upgrades from 9.4

pglogical (http://2ndquadrant.com/en-us/resources/pglogical/ http://2ndquadrant.com/en-us/resources/pglogical/) claims to allow cross version upgrades from 9.4 to 9.5 with minimal downtime, but the documentation seems fairly light-on. Has anyone come across a guide to using it for upgrades?