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

* upgrate go-github client to v32.1.0

* migrate

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

@@ -0,0 +1,154 @@
+// Copyright 2016 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"
+	"strings"
+	"time"
+)
+
+// Timeline represents an event that occurred around an Issue or Pull Request.
+//
+// It is similar to an IssueEvent but may contain more information.
+// GitHub API docs: https://developer.github.com/v3/issues/timeline/
+type Timeline struct {
+	ID        *int64  `json:"id,omitempty"`
+	URL       *string `json:"url,omitempty"`
+	CommitURL *string `json:"commit_url,omitempty"`
+
+	// The User object that generated the event.
+	Actor *User `json:"actor,omitempty"`
+
+	// Event identifies the actual type of Event that occurred. Possible values
+	// are:
+	//
+	//     assigned
+	//       The issue was assigned to the assignee.
+	//
+	//     closed
+	//       The issue was closed by the actor. When the commit_id is present, it
+	//       identifies the commit that closed the issue using "closes / fixes #NN"
+	//       syntax.
+	//
+	//     commented
+	//       A comment was added to the issue.
+	//
+	//     committed
+	//       A commit was added to the pull request's 'HEAD' branch. Only provided
+	//       for pull requests.
+	//
+	//     cross-referenced
+	//       The issue was referenced from another issue. The 'source' attribute
+	//       contains the 'id', 'actor', and 'url' of the reference's source.
+	//
+	//     demilestoned
+	//       The issue was removed from a milestone.
+	//
+	//     head_ref_deleted
+	//       The pull request's branch was deleted.
+	//
+	//     head_ref_restored
+	//       The pull request's branch was restored.
+	//
+	//     labeled
+	//       A label was added to the issue.
+	//
+	//     locked
+	//       The issue was locked by the actor.
+	//
+	//     mentioned
+	//       The actor was @mentioned in an issue body.
+	//
+	//     merged
+	//       The issue was merged by the actor. The 'commit_id' attribute is the
+	//       SHA1 of the HEAD commit that was merged.
+	//
+	//     milestoned
+	//       The issue was added to a milestone.
+	//
+	//     referenced
+	//       The issue was referenced from a commit message. The 'commit_id'
+	//       attribute is the commit SHA1 of where that happened.
+	//
+	//     renamed
+	//       The issue title was changed.
+	//
+	//     reopened
+	//       The issue was reopened by the actor.
+	//
+	//     subscribed
+	//       The actor subscribed to receive notifications for an issue.
+	//
+	//     unassigned
+	//       The assignee was unassigned from the issue.
+	//
+	//     unlabeled
+	//       A label was removed from the issue.
+	//
+	//     unlocked
+	//       The issue was unlocked by the actor.
+	//
+	//     unsubscribed
+	//       The actor unsubscribed to stop receiving notifications for an issue.
+	//
+	Event *string `json:"event,omitempty"`
+
+	// The string SHA of a commit that referenced this Issue or Pull Request.
+	CommitID *string `json:"commit_id,omitempty"`
+	// The timestamp indicating when the event occurred.
+	CreatedAt *time.Time `json:"created_at,omitempty"`
+	// The Label object including `name` and `color` attributes. Only provided for
+	// 'labeled' and 'unlabeled' events.
+	Label *Label `json:"label,omitempty"`
+	// The User object which was assigned to (or unassigned from) this Issue or
+	// Pull Request. Only provided for 'assigned' and 'unassigned' events.
+	Assignee *User `json:"assignee,omitempty"`
+	// The Milestone object including a 'title' attribute.
+	// Only provided for 'milestoned' and 'demilestoned' events.
+	Milestone *Milestone `json:"milestone,omitempty"`
+	// The 'id', 'actor', and 'url' for the source of a reference from another issue.
+	// Only provided for 'cross-referenced' events.
+	Source *Source `json:"source,omitempty"`
+	// An object containing rename details including 'from' and 'to' attributes.
+	// Only provided for 'renamed' events.
+	Rename      *Rename      `json:"rename,omitempty"`
+	ProjectCard *ProjectCard `json:"project_card,omitempty"`
+}
+
+// Source represents a reference's source.
+type Source struct {
+	ID    *int64  `json:"id,omitempty"`
+	URL   *string `json:"url,omitempty"`
+	Actor *User   `json:"actor,omitempty"`
+	Type  *string `json:"type,omitempty"`
+	Issue *Issue  `json:"issue,omitempty"`
+}
+
+// ListIssueTimeline lists events for the specified issue.
+//
+// GitHub API docs: https://developer.github.com/v3/issues/timeline/#list-timeline-events-for-an-issue
+func (s *IssuesService) ListIssueTimeline(ctx context.Context, owner, repo string, number int, opts *ListOptions) ([]*Timeline, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/issues/%v/timeline", 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
+	}
+
+	// TODO: remove custom Accept header when this API fully launches.
+	acceptHeaders := []string{mediaTypeTimelinePreview, mediaTypeProjectCardDetailsPreview}
+	req.Header.Set("Accept", strings.Join(acceptHeaders, ", "))
+
+	var events []*Timeline
+	resp, err := s.client.Do(ctx, req, &events)
+	return events, resp, err
+}