move key closure warnings to errors (#2052)
move key closure warnings to errors (#2052)


deepanjanroy/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,cedricbellet/lighthouse,umaar/lighthouse,mixed/lighthouse,arturmiz/lighthouse,ev1stensberg/lighthouse,mixed/lighthouse,deepanjanroy/lighthouse,tkadlec/lighthouse,GoogleChrome/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,deepanjanroy/lighthouse,ev1stensberg/lighthouse,cedricbellet/lighthouse,cedricbellet/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,wardpeet/lighthouse,arturmiz/lighthouse,cedricbellet/lighthouse,ev1stensberg/lighthouse,umaar/lighthouse,GoogleChrome/lighthouse,cedricbellet/lighthouse,mixed/lighthouse,tkadlec/lighthouse,mixed/lighthouse,GoogleChrome/lighthouse,deepanjanroy/lighthouse,GoogleChrome/lighthouse,tkadlec/lighthouse,wardpeet/lighthouse,wardpeet/lighthouse,umaar/lighthouse,arturmiz/lighthouse,tkadlec/lighthouse