Use in_reply_to_id to lookup GitHub replies

[kemchenj]

Currently, danger's comment replies lookup logic for GitHub is basically guessing, cause at that time GitHub doesn't have a concept for "reply".

The good news is GitHub API has filled this pit:

// https://docs.github.com/en/rest/pulls/reviews#list-reviews-for-a-pull-request
"in_reply_to_id": {
  "description": "The comment ID to reply to.",
  "type": "integer",
  "examples": [
    8
  ]
}

So let's move on with this new right way.

[manicmaniac]

@kemchenj

Looks really nice 👍
Could you add some tests for this change?

At a glance, there seems no tests for inline comments with replies but this test case looks similar.

danger/spec/lib/danger/request_sources/github_spec.rb

Line 498 in bd48382

it "removes inline comments if they are not included" do

[orta]

Does anyone know when this was added? Older GitHub enterprises may not have this in their API, which is what I'd be wary of