* add new types of performance monitoring
* adding LCP
* adding cls to perf relayer
* add test for cls and lcp
* nit fixes
* re-organizing code
* fixing tests for lcp
* updating size limits in test
* switches analytics relay test from dev to prod
* Update test/integration/relay-analytics/test/index.test.js
Co-Authored-By: Joe Haddad <joe.haddad@zeit.co>
Co-authored-by: Joe Haddad <timer150@gmail.com>