Change CommentAttachement redact from DELETE to PUT HTTP Method

[rbonnefille]

Issue

Server returns 404 error when trying to redact a comment attachment. This is due to the fact the method is using a delete and not a put http request.

Error from console:
Error: Request processing failed: Zendesk Error (404): Item not found

Source: #

node-zendesk/src/clients/core/attachments.js

Line 81 in 5141990

return super.delete(

##Fix

Change method by PUT:
super.put