Bump up the number of connections per mailsync process.
Bump up the number of connections per mailsync process.

jobscore/sync-engine,closeio/nylas,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,closeio/nylas,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,nylas/sync-engine,jobscore/sync-engine,nylas/sync-engine