fix(event-list): add deprecation warning
fix(event-list): add deprecation warning

[#82682502]

Signed-off-by: Geoff Pleiss <9875a3586c9e5c98a1a53f88b416459dcaffc47c@pivotallabs.com>

CanopyCloud/pivotal-ui,sjolicoeur/pivotal-ui,sjolicoeur/pivotal-ui,pivotal-cf/pivotal-ui,CanopyCloud/pivotal-ui,npm/pivotal-ui,sjolicoeur/pivotal-ui,CanopyCloud/pivotal-ui,pivotal-cf/pivotal-ui,npm/pivotal-ui,pivotal-cf/pivotal-ui,npm/pivotal-ui,sjolicoeur/pivotal-ui