[feature request] Add support to list commits that only affect a file path

[dinox0r]

Context

The GitHub API allows listing commits that only affect a file path:

https://developer.github.com/v3/repos/commits/#list-commits-on-a-repository

This endpoint also allows further filtering using the since and until parameters:

curl --include -H "Authorization: token <TOKEN>" \
   "https://api.github.com/repos/USER/REPO/commits?path=/some/path.txt&since=2018-07-0100:00:00Z"

None of these are yet present in the library. Currently, listing commits is done thought the listCommits method, defined as:

public PagedIterable<GHCommit> listCommits() { ... }

And can be used like:

GitHub github = ...
for (GHCommit commit : github.getRepository("[some-repo]").listCommits()) {
   // ...
}

Request

Ideally, something similar to the following is desireable:

public PagedIterable<GHCommit> listCommits(String filePath, ZonedDateTime since, ZonedDateTime until) {

That only lists commits within the specified date range that only affect the given file path.

[dinox0r]

Totally missed the queryCommits() method.