Update vendoring

vendor/github.com/google/go-github/github/orgs.go

@@ -68,6 +68,39 @@ func (p Plan) String() string {
 	return Stringify(p)
 }
 
+// OrganizationsListOptions specifies the optional parameters to the
+// OrganizationsService.ListAll method.
+type OrganizationsListOptions struct {
+	// Since filters Organizations by ID.
+	Since int `url:"since,omitempty"`
+}
+
+// ListAll lists all organizations, in the order that they were created on GitHub.
+//
+// Note: Pagination is powered exclusively by the since parameter. To continue
+// listing the next set of organizations, use the ID of the last-returned organization
+// as the opts.Since parameter for the next call.
+//
+// GitHub API docs: https://developer.github.com/v3/orgs/#list-all-organizations
+func (s *OrganizationsService) ListAll(opt *OrganizationsListOptions) ([]Organization, *Response, error) {
+	u, err := addOptions("organizations", opt)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	req, err := s.client.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	orgs := []Organization{}
+	resp, err := s.client.Do(req, &orgs)
+	if err != nil {
+		return nil, resp, err
+	}
+	return orgs, resp, err
+}
+
 // List the organizations for a user.  Passing the empty string will list
 // organizations for the authenticated user.
 //