Bad request definition can cause convertRequests to hang

[JoshMock]

I was using the new JS converter to update all the examples in the JS client repo, and convertRequests kept hanging on bad request definitions that look like:

{
  "took": 17,
  "timed_out": false,
  "_shards": {
    "total": 4,
    "successful": 4,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 10,
      "relation": "eq"
    },
...

I'm not sure yet if it's the lack of an HTTP verb, or the fact that it's incomplete and ends with ..., but it causes the function's promise to never resolve.