Add 1 more mongoose dependent that I missed (#487)

to expectedFailures.

Author: sandersn

packages/dtslint-runner/expectedFailures.txt

@@ -32,6 +32,7 @@ mongoose-simple-random
 mongoose-unique-validator
 mongoose-gridfs-storage
 mobx-apollo
+multer-gridfs-storage
 multer-gridfs-storage/v3
 ng-cordova
 passport-local-mongoose