[Vendor] upgrade google/go-github to v32.1.0 (#12361) (#12390)

* upgrate go-github client to v32.1.0

* migrate

vendor/github.com/google/go-github/v32/github/pulls_reviewers.go

@@ -0,0 +1,80 @@
+// Copyright 2017 The go-github AUTHORS. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package github
+
+import (
+	"context"
+	"fmt"
+)
+
+// ReviewersRequest specifies users and teams for a pull request review request.
+type ReviewersRequest struct {
+	NodeID        *string  `json:"node_id,omitempty"`
+	Reviewers     []string `json:"reviewers,omitempty"`
+	TeamReviewers []string `json:"team_reviewers,omitempty"`
+}
+
+// Reviewers represents reviewers of a pull request.
+type Reviewers struct {
+	Users []*User `json:"users,omitempty"`
+	Teams []*Team `json:"teams,omitempty"`
+}
+
+// RequestReviewers creates a review request for the provided reviewers for the specified pull request.
+//
+// GitHub API docs: https://developer.github.com/v3/pulls/review_requests/#request-reviewers-for-a-pull-request
+func (s *PullRequestsService) RequestReviewers(ctx context.Context, owner, repo string, number int, reviewers ReviewersRequest) (*PullRequest, *Response, error) {
+	u := fmt.Sprintf("repos/%s/%s/pulls/%d/requested_reviewers", owner, repo, number)
+	req, err := s.client.NewRequest("POST", u, &reviewers)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	r := new(PullRequest)
+	resp, err := s.client.Do(ctx, req, r)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return r, resp, nil
+}
+
+// ListReviewers lists reviewers whose reviews have been requested on the specified pull request.
+//
+// GitHub API docs: https://developer.github.com/v3/pulls/review_requests/#list-requested-reviewers-for-a-pull-request
+func (s *PullRequestsService) ListReviewers(ctx context.Context, owner, repo string, number int, opts *ListOptions) (*Reviewers, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/pulls/%d/requested_reviewers", owner, repo, number)
+	u, err := addOptions(u, opts)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	reviewers := new(Reviewers)
+	resp, err := s.client.Do(ctx, req, reviewers)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return reviewers, resp, nil
+}
+
+// RemoveReviewers removes the review request for the provided reviewers for the specified pull request.
+//
+// GitHub API docs: https://developer.github.com/v3/pulls/review_requests/#remove-requested-reviewers-from-a-pull-request
+func (s *PullRequestsService) RemoveReviewers(ctx context.Context, owner, repo string, number int, reviewers ReviewersRequest) (*Response, error) {
+	u := fmt.Sprintf("repos/%s/%s/pulls/%d/requested_reviewers", owner, repo, number)
+	req, err := s.client.NewRequest("DELETE", u, &reviewers)
+	if err != nil {
+		return nil, err
+	}
+
+	return s.client.Do(ctx, req, nil)
+}