Fix ListPullRequestsWithCommit option type

[RickleAndMortimer]

ListPullRequestsWithCommit uses PullRequestListOptions as one of it's parameters. This is incorrect because in GitHub's documentation, the endpoint for this function, repos/%v/%v/commits/%v/pulls, does not share the same parameters as the ones defined in ListPullRequestsWithCommit

go-github/github/pulls.go

Lines 119 to 141 in 96726d8

	typePullRequestListOptionsstruct {
	// State filters pull requests based on their state. Possible values are:
	// open, closed, all. Default is "open".
	Statestring`url:"state,omitempty"`
	// Head filters pull requests by head user and branch name in the format of:
	// "user:ref-name".
	Headstring`url:"head,omitempty"`
	// Base filters pull requests by base branch name.
	Basestring`url:"base,omitempty"`
	// Sort specifies how to sort pull requests. Possible values are: created,
	// updated, popularity, long-running. Default is "created".
	Sortstring`url:"sort,omitempty"`
	// Direction in which to sort pull requests. Possible values are: asc, desc.
	// If Sort is "created" or not specified, Default is "desc", otherwise Default
	// is "asc"
	Directionstring`url:"direction,omitempty"`
	ListOptions
	}

This PR simply sets the correct options, ListOptions, for the ListPullRequestWithCommit.

see #2815 for more details

[gmlewis]

Thank you, @RickleAndMortimer !
Please run gofmt on the files you edited and push (not force push) the changes to this PR.
See CONTRIBUTING.md for more details.

[gmlewis]

Fixes: #2815.

[codecov]

Codecov Report

Merging #2822 (2dd9f5c) into master (96726d8) will not change coverage.
The diff coverage is 100.00%.

@@ Coverage Diff @@## master #2822 +/- ##
=======================================
Coverage 98.06% 98.06% =======================================
Files 136 136 Lines 12279 12279 =======================================
Hits 12041 12041 Misses 162 162 Partials 76 76 

Impacted Files	Coverage Δ
github/pulls.go	96.77% <100.00%> (ø)

... and 1 file with indirect coverage changes

[gmlewis]

Thank you, @RickleAndMortimer !
LGTM.

Awaiting second LGTM+Approval from any other contributor to this repo before merging.

[valbeat]

LGTM!

[gmlewis]

Thank you, @valbeat !
Merging.