_count queries don't work

[mbergwall2222]

Hey, when doing joins like this:

{
   "joins":[
      "clients",
      "_count.select.comments"
   ]
}

the library is parsing that as:

{
   "_count":{
      "include":{
         "select":{
            "include":{
               "comments":true
            }
         }
      }
   },
   "client":true
}

Which throws a prisma error. It should parse to:

 {
   "client":true,
   "_count":{
      "select":{
         "comments":true
      }
   }
}

[mbergwall2222]

Opened PR to resolve: #499