frontend_server_client-v2.1.3

What's Changed

• Require vm_service 8.3.0 by @annagrin in #1616
• remove a todo from the frontend_server_client readme by @devoncarew in #1617
• Prep to publish frontend-server-client by @annagrin in #1618

Full Changelog: frontend_server_client-v2.1.2...frontend_server_client-v2.1.3