* updates relayer, uses web-vital lib, removes fid polyfill and removes unstable prefix from relayer * simplify logic, fix null check * update docs * Update tests * Rename relayWebVitals to reportWebVitals Co-authored-by: housseindjirdeh <houssein@google.com>
Co-authored-by: siarhei.fedarovich <siarhei.fedarovich@ticketmaster.com> Co-authored-by: Joe Haddad <joe.haddad@zeit.co>
* 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