support for collection bulkwrite

[Devendra Modium]

Hi

I am trying to use https://docs.mongodb.com/manual/reference/method/db.collection.bulkWrite/,  but casbah 3.1 version doesn't seems to support that. 

The reason I am trying to use collection bulkwrite is below issue I am running into

https://stackoverflow.com/questions/42570675/bulk-write-operation-error-on-server-ip27017-write-errors-com-mongodb-bulkwr

Any plans to add support for that Or  if there are any other workarounds, please let me know?

Thanks