Update Kusama Council seats & Runners Up number (#1614)

* Update Kusama Council seats & Runners Up number

Update Kusama council seats to 19 and DesiredRunnersUp to 19 as well, increase representation of passive stake holders in the council and giving more visibility to runners up in Kusama Network (from 7 to 19): this will be more visibility to new candidates to expand options for stakeholders when voting.

* Update lib.rs

* Update lib.rs