Add AvatarURL and WebURL to MergeRequest resource

There are already available in v11.11.2
https://docs.gitlab.com/ee/api/merge_requests.html#get-single-mr

merge_requests.go

@@ -51,6 +51,8 @@ type MergeRequest struct {
 		Name      string     `json:"name"`
 		State     string     `json:"state"`
 		CreatedAt *time.Time `json:"created_at"`
+		AvatarURL string     `json:"avatar_url"`
+		WebURL    string     `json:"web_url"`
 	} `json:"author"`
 	Assignee struct {
 		ID        int        `json:"id"`
@@ -58,6 +60,8 @@ type MergeRequest struct {
 		Name      string     `json:"name"`
 		State     string     `json:"state"`
 		CreatedAt *time.Time `json:"created_at"`
+		AvatarURL string     `json:"avatar_url"`
+		WebURL    string     `json:"web_url"`
 	} `json:"assignee"`
 	SourceProjectID           int        `json:"source_project_id"`
 	TargetProjectID           int        `json:"target_project_id"`
@@ -73,6 +77,8 @@ type MergeRequest struct {
 		Name      string     `json:"name"`
 		State     string     `json:"state"`
 		CreatedAt *time.Time `json:"created_at"`
+		AvatarURL string     `json:"avatar_url"`
+		WebURL    string     `json:"web_url"`
 	} `json:"merged_by"`
 	MergedAt *time.Time `json:"merged_at"`
 	ClosedBy struct {
@@ -81,6 +87,8 @@ type MergeRequest struct {
 		Name      string     `json:"name"`
 		State     string     `json:"state"`
 		CreatedAt *time.Time `json:"created_at"`
+		AvatarURL string     `json:"avatar_url"`
+		WebURL    string     `json:"web_url"`
 	} `json:"closed_by"`
 	ClosedAt                 *time.Time `json:"closed_at"`
 	Subscribed               bool       `json:"subscribed"`