Release components using v2

[justincy]

Earlier this year we upgraded all components to use Polymer v2 but we never released them because the first stable release of Polymer v2 wasn't out yet. Let's finally release those versions. This will be v3 of the components.

• [x] fs-behavior
• [x] fs-client
• [x] fs-signin
• [x] fs-person-behavior
• [x] fs-person-portrait
• [x] fs-person-summary
• [x] fs-person-card
• [x] fs-person-chip
• [x] fs-person-facts
• [x] fs-person-families
• [x] fs-person-sources
• [x] fs-pedigree
• [x] sample app