Kibana: browserslist: caniuse-lite is outdated in Kibana logs if user triggers optimization

[bhavyarm]

Kibana version: 7.2.0 BC5

Elasticsearch version: 7.2.0 BC5

Server OS version: darwin_x86_64

Original install method (e.g. download page, yum, from source, etc.): from staging

Describe the bug: If you make changes in kibana.yml(for example xpack.graph.enabled: true) which trigger optimize - kibana logs show

browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`

Kibana logs:

bin/kibana
  log   [14:19:34.672] [info][optimize] Optimizing and caching bundles for monitoring, space_selector, login, overwritten_session, logout, logged_out, ml, dashboardViewer, apm, code, maps, canvas, infra, siem, uptime, kibana, stateSessionStorageRedirect and status_page. This may take a few minutes
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`
Browserslist: caniuse-lite is outdated. Please run next command `npm update caniuse-lite browserslist`

[elasticmachine]

Pinging @elastic/kibana-operations

[joshdover]

Maybe we should set the BROWSERSLIST_IGNORE_OLD_DATA env var so this doesn't happen in distributables.