Add DELETE functionality when options are passed in

[dmhalejr]

I have a delete endpoint that needs to get passed in a json_body and keep receiving wrong number of arguments (0 for 1..2) I think this change in the gem might help?

The parameters needed for the DELETE:

{
  "contact_ids": [
    "string"
  ]
}

First PR to an open source project so please be gentle! :)

[brooklynDev]

Thanks for the commit. At first I was hesitant because I was always under the impression that DELETE requests shouldn't have a body, but after reading up on it, it seems to be more of a gray area than a conclusive one, so I'll pull this in. Thanks!