[FIX] Update rocketchat:streamer to be compatible with previous version

[sampaiodiego]

@RocketChat/core

Make it backwards compatible so it fixes this exception:

TypeError: undefined is not iterable
  at Streamer.isReadAllowed (/app/bundle/programs/server/packages/rocketchat_streamer.js:258:37)
  at Subscription.<anonymous> (/app/bundle/programs/server/packages/rocketchat_streamer.js:356:15)
  at Subscription.<anonymous> (/app/bundle/programs/server/packages/rocketchat_lib.js:2149:15)
  at packages/matb33_collection-hooks.js:307:21
  at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:15)
  at Subscription._handler (packages/matb33_collection-hooks.js:306:28)
  at maybeAuditArgumentChecks (/app/bundle/programs/server/packages/ddp-server.js:1826:12)
  at DDP._CurrentPublicationInvocation.withValue (/app/bundle/programs/server/packages/ddp-server.js:1166:73)
  at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1186:15)
  at Subscription._runHandler (/app/bundle/programs/server/packages/ddp-server.js:1166:51)
  at Session._startSubscription (/app/bundle/programs/server/packages/ddp-server.js:1014:9)
  at Session.sub (/app/bundle/programs/server/packages/ddp-server.js:806:12)
  at /app/bundle/programs/server/packages/ddp-server.js:744:85