Upgrade github.com/google/go-github v32.1.0 -> v37.0.0 (#16661)

* Upgrade github.com/google/go-github vv32.1.0 -> v37.0.0

* refactor: use GetX() func to reduce code

vendor/github.com/google/go-github/v37/github/issues_assignees.go

@@ -0,0 +1,85 @@
+// Copyright 2013 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"
+)
+
+// ListAssignees fetches all available assignees (owners and collaborators) to
+// which issues may be assigned.
+//
+// GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/issues/#list-assignees
+func (s *IssuesService) ListAssignees(ctx context.Context, owner, repo string, opts *ListOptions) ([]*User, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/assignees", owner, repo)
+	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
+	}
+	var assignees []*User
+	resp, err := s.client.Do(ctx, req, &assignees)
+	if err != nil {
+		return nil, resp, err
+	}
+
+	return assignees, resp, nil
+}
+
+// IsAssignee checks if a user is an assignee for the specified repository.
+//
+// GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/issues/#check-if-a-user-can-be-assigned
+func (s *IssuesService) IsAssignee(ctx context.Context, owner, repo, user string) (bool, *Response, error) {
+	u := fmt.Sprintf("repos/%v/%v/assignees/%v", owner, repo, user)
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return false, nil, err
+	}
+	resp, err := s.client.Do(ctx, req, nil)
+	assignee, err := parseBoolResponse(err)
+	return assignee, resp, err
+}
+
+// AddAssignees adds the provided GitHub users as assignees to the issue.
+//
+// GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/issues/#add-assignees-to-an-issue
+func (s *IssuesService) AddAssignees(ctx context.Context, owner, repo string, number int, assignees []string) (*Issue, *Response, error) {
+	users := &struct {
+		Assignees []string `json:"assignees,omitempty"`
+	}{Assignees: assignees}
+	u := fmt.Sprintf("repos/%v/%v/issues/%v/assignees", owner, repo, number)
+	req, err := s.client.NewRequest("POST", u, users)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	issue := &Issue{}
+	resp, err := s.client.Do(ctx, req, issue)
+	return issue, resp, err
+}
+
+// RemoveAssignees removes the provided GitHub users as assignees from the issue.
+//
+// GitHub API docs: https://docs.github.com/en/free-pro-team@latest/rest/reference/issues/#remove-assignees-from-an-issue
+func (s *IssuesService) RemoveAssignees(ctx context.Context, owner, repo string, number int, assignees []string) (*Issue, *Response, error) {
+	users := &struct {
+		Assignees []string `json:"assignees,omitempty"`
+	}{Assignees: assignees}
+	u := fmt.Sprintf("repos/%v/%v/issues/%v/assignees", owner, repo, number)
+	req, err := s.client.NewRequest("DELETE", u, users)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	issue := &Issue{}
+	resp, err := s.client.Do(ctx, req, issue)
+	return issue, resp, err
+}